chem model papers

7/27/2019 Chem Model Papers

1/41

,l

16.

What is.Hel-

olhard-Zelinslry

HVZ

reaction?

Give

an example.

i I t t l

ll

f

ln l r l

I

l . r l l l

|

| l i t - l l " I l l /

"

t l ( ,1,1

'n

' l

lt

-v

Subject

code-34'

Hax

Marks:

70

17.Give

he

use f

ollowing

ompounds

-

,

(i)

Norethlndrone

ii)

Ra1S.d ne,

l2

Ar-

\

"

\

1.1,. : . .1i.".=

..-: i, ," i. . i. .

..

.

,

ltjlwhat

are

non-soapy

et-erger-rts?:Gve

ne example-

PART-C

IfI. Answer

any

FilE

of

the following

quqstions

:

(

Each

questionicarrieis'3

afks.')

'

'::

('t9.'Oraw

neat

abeled

iagnm

f blast

urn.ice.

Wiite he equatio.ns

or

he eadions

taking

lace

n he

emperature

:lnge 00-1073K

uring he

extraction

fcast

rpn

rom

. - , t . \ . \ .a

clr-gl f" ' l )Av^t

a

'^d

0.

l

-

.

5af=-15

1

. . ' ,

,{

2+ I

2'F1

t

r,

ll

,t

..

, |: ,

: t i , ,1 'r1'- r

-=

t ' l r

lrnl lr

A, l t ,

(

' l l l ( l

l ) ' nl l

l ) ' l r ts

ar i

compulsory'

,- ,r t

l . r l r ,

'

l . l r r lr l ,

r l r ' r1tt ' t l l r r t r r

' t t t t l t l l ' lw

l 'r lr.

ne

rv

c,f t ' f

(

t

1)c-..r\

C'1

r ' I ' '

,'

*".1:

, ' , , , ,

ost

abundant

oble

as

n he

atmosph-r..

i r^^1>'- 'r " t

- ' t r

a f stcg

.

Nr"

,)

ArQOin

,. . .

i , rr,r l

rrolecul t

r r , , - - ,u: l l y . rJn0cieto; ]enonc,urhic i ig ivesycl lc l "preci i r i 'Lai 'e ' ' r ' i i l rsodiu;- r

^

l ) lo ' l

9

u

, ûi,1eand

odine

olution?

\

. .

tc

phe-\

ovle

r,f t

r ' ' " "

r: .

.

' r1

rNq

i ' '466r

ÂRT_B

-.,,ey

doY

FIVE of the

fol lowing

quest ions ;

5x2=

10

i l 'f l l i f

question

arries

marks

'

'

(Eu-'^,',, ',nu'forthe

following:

i

l- i

c,1qe

.

ir

S"

Z

'

r'r

-)

t1. l : , '?; ;k. t

efect

s

oi found

nal ld[mbtal

al ides'

.c lr"1r {

.

t r\ . ,y, \ ,

lll ..nottky

efect

0wers

he

ensityf onic olid'

l t t )

''

'

/nhlrausch's

aw .

tz

,]t:J;;;;

expre:,sion

or

molar

ohduaivity

of

potbssium

ulphate

t

inlrnitc

dilutiott

cttrrtl i ttr;

] j ' [oPtrausch's

aw

'"

-rr,nn

s

of

second

rder

ith espect

o

a

reactant.

Jow

:;

t l t , t t t :

rf f t : t tul

f lx '

^

A

(eou'-

t3'A"tniriTration

f

the

eactant

s

(i)

doubled

(ii) reduced

o

ltalf ?

",

^,,n

fry

Ceo*

sa

good xidiz inq

gent

whi le

Etrl*

s

goocl c i luci rrq

t. ; t :rt t

tr

)(Ir( 'otr ' ,

14

?l l ' i^ lo.nrhqrôrcle

-\-

\t

\ \^.

r - r

nL,1.,

rr, ,

),

\

, 'v

"

\" \

^|

l[ l0l

'

5v' '

, .rnou

Lol lvert

ropcne

o

proparl -l -ol

i

. ( l iow

u"

(i)

Plil

h,-rsowcr

oiling

oint

han

NH:.

\lprence

6'.f

.

:x1-

e

tit{-qtcJt

c:

v^'1'4'rro

6Ond'.r^4

( i i )

Al rrxrrn ernperatrrrc,

2

s

much

less reactive.


2/41

ryr i

PART-D

3xg=15

.,or

anY

HREE

f

the

fol lowing

uestions

Ao5w"-,,pstion

arries

5 marks

l;::;;"'o:i::l:::::::i]

t'u"^|"^*qX

has

o*r,* ,,

Q,zlslcrl.

f

n.

uag"

.nftt

"j.SS

ryt^t-",Il

s

400pm,

lz.

a)

Al

:iil;;iil.o;

bubicnir

ell;

Motar

ass

ii=eo9'lm.l,

r'=.6.022'x

d23mol'

oillT.''i

;fiii';il.;il;

"i'x=boe"6J,

i=

'022'x

d23morr

3

./,

\" /

, lontlry

Lrrer /re

sv'r'. \

"-'--

r:::

:

-

tuv-

.,..t Wpe

f

crystalline

o,,O

,

On

ce?

ame

he

binding

orcps-Present

n dry

ce'

2

(b)vVhat'rr-

'orii-

--

-

- _119_?:"1flj::

in

qo

?n rwarr

vr l"lvc\î

po\Cv

Lq'\u {r \

\vrLs'

, rr'eboilinq

point

of a

solution

ontaining

'529

of

glucose

dissolved

n

B0'29

of

Water'

rind '"..i'r'îI"'"^J^ I ,"n.r-"r nrlK" orwater 0:52Kkgmol-r ' 3

zB..) '^l:,I"n.#

"7

6i"i,i*;.'r-a,tifiotnauorwaier'=-0 sz-K.ke:to''1

'

lut''"'

.^^,;, ^ff ri.|^-l i i iu.r i. fhov2trpnf van't Hoff fJgtor,

or

a

comp

r,:;"van,t

Hoff

actor.

what

s

he

alue

f

van,t

Hoff

actor

or

a

compound

f

ul

otlf.""rirs

uttaruiiruiion n-un

rgunic

olvent?

'?

E'

2

fijirgrrn'ttttamerisaiion

in

an

rganic

olvent?

'?

F

L

--->

-

. first-order

eaction,

he

concentration

f

reactant

ets educed

rom

(b)

1l:r

;

0.2M

n 5min.

Calculate

ate

onstant

f

he

reaction'

0 or ' ' -

.

^

,.ttri,

ell

s set

up

at

250c

ith

he

ollowing

alf-cells:

30.

a)

A

""*-,4qi

(0.001li ,1)

nd

Cu

Cu2*

0.lM)

na'

62lcibre

he

El'4F

r'tneceit.

'E as

0'av

and

Eocu

0'34v

--.--

âny

wc

differences

ehveen

lectronic

onciuctors

nd

electrolytic

onductors'

' i r r

{'

\:

' '

\L

/

'-

3

7

^^nne

he

ollowing

erms

'

' ; ' \

)cr '-

""i iO

oiulvri r

(i i i )Heterogeneous

atalysis

3

I

t tol

j r)

6;ectroPtrorests

.,rrri t

he

drspersed

hase nd

ispersiop

rediunr

f

the

fol lowing

ol loidal

ystenrs '

(Dl

1,, .oke

(i i )

Mi lk

(' /

qG"

'l

I

. .-,31ry

HREEor

t i6?ttowing

questions

3x5=

15

V.

A.n5l;uestions carries

5

marks

)

(

tactt

-

"

';

. . .una|inZai tsev,s(Saytzeff)ni tewitnanexample.

u u:,,::_does

chlorobenzene

eact

with

methyl

qhloride

n

,presence

f

aphy.Qrous

EI:?

,.

'.2,,

(b;n""

,

, . ,

. . : i

. , , .

r '1 ,

j. . : ', . , : : ,

l: '. .

"

I

r

r"

tdentifY

tne:

.:

I

(c)

Arrange

he

ollowing

n he ereasin"g

rder

f

reactivityoWards

nucleophilic

ubstitution

eactions'

'

,rr"

Noz

/Na.,

{,4

l \ - / l

I

Noz

(II)

33.

(a)

Mention

he

major

roducts

ormed

n he

ollowing

eactions.

(i) (cHr3

C-o-CH:

HI

(ii)

oH

-_-..--_.-.->

I

cl

-(o

Y

(r)

Nou

(ur)

(i i i) CHr-CH=CH-CHrCHz-OH

.

(b)

Ao

organic

ompound

P)

with he

ormula.

rHoo

reactswith

cH:cHzM9cl.

The

product

.

t:ormed

n

hydrolysisorms

nalcohol

(q).

Alcohol

Q

on

warmingwith Lucas

eagent

formscloudiness. amehecompounds and Q. 2

34.

(a)

How

do

you br ing about he

ollowing

onversions?

3

(i )

Ethanol

o

ethanal

(i i )

Ethanal

o but-2-enal

(i i i )

Benzaldehyde

o Benzaldehycle

yalohydrtn

(b)

What

s formatin?

Give ne

use

of t.

2

35.

(a)Explain insberg's

est

or hedist inct ion

f

primary,

secondary

nd ert ibry

mines.

I

-l\

dit.

HNor

l (J l-

\-..,

pcc

i ( l la.t*..n

benzenamine

nd mmonia,

hich s ess

asic

ndwhy?

36.

(a)

Write

he

main

struitural

ifference

etween

DNA

andRNA'

Name

he

nitrogen

ase

resentnly n

RNA

ut not

n DNA

(b)

Give

n

examPle

achor.

'

(fiOptically inactive -amino

cid

,

''(fl

Water

oluble

itamin

,-

(c)

Write

he

Haworth's

tucfure

or

monomer

rgsent

n cellulose'

fii.f

al **.

the

structure

f

he

moriomer

or

dEchof

the

folloiffng

olymers'

\

-

/

(i) Nylon

6

(ii)

PolYProPene

(iii) Natural

ubber

(b)

What

re

hermosefting

olymers?ive

neexample.

I

o{)rr

tr l

'2

.l


3/41

t"l

l cup.ro.ii,-

1N,T

.l M

1M

CH:

I

CH,=

C-CH=CH:

b) .Thesearethepolymershavingextensi " "c'oss- l inkingandcannojberemoul -ded' ,

Emmpte

-

Brikelite

i.

,

:

IM

1M

i

, '-i

I I I ' tJc

il

l , )Mls ' l ' l tY

MODIql,

tJ l :S' l ' lON

'r \ ' l ' l l l

'l

TIME

: 3

Hrs.

5 minutes

I

Mirtrrrrtt trt

Mrtrks

't0

._ t

lnstruciions

I

t'

ThegdstiodiaplrhNfourparts:

A.B,Crnd

D.Answcr

all thc

pnrt:

D

'Wrilcbalffied

chmim

cquatiorourd dnw labcllcrl

diagranrs

whcr

cvcr

rc(lor'nl

I

iiD Uselogtdbleandsimplecalculat6rilnccsary

.

'

I

Airswerlal i , thequest ion : ,

l0xl=10

I

)

On

what

actor

he

value

ofcolligative

ropertydepends

1

2)

Whathappens

o

hesoJubilitya

gas

n

water

n

ncreasing

hc cmpcrature')

{q-r(

'aqcf

3) Namb

hemetal

usedin

galvanisation.ofron-

Z;n


4/41

ry

i i t ion

methl

ons

are

cojoured'

'

'

( i i ) Explain

why transrhon

etal

ons

urc

u: i " '*

25)

[ring

vBT,

expiain

he

ornratiOn

f

[NiClJ

:'

-

^.

26;

(i) iive

the

aPACnarneof[Cr

NIl,),

(H'o)j]

C '

Answer

any Three

of

the

ol lorving

'

3

zif

^l

Ciassify

he

ollowinginl"iiiftl.'.11

vnes

:l:rvstalline

solids'

I

(i)

iodine tiii'sio,

(iii)

copper

nreral

(tv) Mgo

b) Wfrat

s

nrpantby

o-ordination

rrnrber

n

so-lids

What

s

the

co-ordination

ttnrber f atoms n

(i )

FCCalrangement

i i ) BCCarrangenrent?

'

28)

a)

What

are

azcotropes

Give

an

exampte'

b)

The

oiling

oiniof

yarerecomes

{tois10:c

t:" l'u.g.fi-,

'

z no**lJiiesoluteis

issolved

n

00g

fJ1,.

fo{.ate'eit't:.'

rnolurrnu"'ofthesotute(\ofwater=0'6K/kg/rnol) ' , '"- ' '"

2g)a)Definemolu,,ond*tunuL.hnutis i tsS.I.urri t?.

b)

Calculate

he

etecJJ"

fotential

of

ZnlZnSO''(0'01M)

t?5'

(Givbn t;,

=

-0'76V)

30)

u;

M.,ition

ony

rvo

actois

ffeeting

he

ateof

reaction

b)

Half

life

period

f

a

irst

order

eaction

s

30

min'

Calcnlate

he

time

reqlired

o

complete

0%

of

the

eaction'

3l ) a) Give

any

wo

ditferences

etween

yophilic

and

yophobic

pqlioids'

ti)

Mention

""y

'*of"i;"

affecting

headsorption f gases nsolids'

l+ 2

'

trl+2

x5=15

7

:

.i

Ciu"

an

example

or

heterogeneotts

atalysis

r\nstrcr

t t t t ' iottr

of

hc frrl lorv ing

lZi

^l

f low

doos

hlorobcnetnc

elct

v l l l r

rcci f

chloride

bi

Explain

delrydrohalogcnatton

vith

an

cxanrplc'

'

.3

2

2

I

\ I

=

lu

2

7

I

2

A

I

3

2

3

2

L

I

,: 2

j

'7

2

I

1

7

I

c)

What

s

chiral

arbort

t tott t

33)

a)

Give

one

example

acl t

i rr

' t t t tpl t '

rr l ' l

r l r\cd

t l lL'rs '

'

Ui

Wri te

chemical

quations

i i r

ltc

crrt tr

r: ; iott

f

( i )

phenol lopicricacid

(i i )phcnol tobcnzene

.

iiil)'",tt.ne

to ethyl

alcohol'

34)

a)

Explain

decarboxylation

ith

an

exantP,le'

,

1'

u)'

Ho*

i,

acetone

btained

rqm

Acetyl

lloride

?

6b Nu*"

ttt"

ketone

ised

nthe

preparation

[

tear

gas'

35)'

Y

How

s

anilineprepared

romnitrobenzene

I

b1

llowdo.sr.rr,yr#reiiaittitr,t

..ttoimethyl

odi{e?

ivLequations'

36) ,aj

Write

he

Hawgrthslrlc]ure

f

Ma-ltose'

b)

Cive

an

examPleeach

or

:

(i)l:a't

urib

cr

'aniino-acid'(ii)

globular

protein'

c)

Narle

the

vitanrin

vhose

eficiency

auies

Rickets'

l7)

;j

nisiingr',istttto*.en

hernloplasticand

lrtinrosetting'polyntcrs'

tr)

( ' l rrssi fy

l rc

ol lorvi rrg

nto

olyanri t lcs

nd

polyeslcrc:

Nylon"(r.(r, ' l i : tYlcttc

t

)

Nrtt t tr '

l tc

lx)l l (t l l lc f

t'

"t ' ' t ' t t t l t l ' . . . . .

9),

,

1'0)

l)

2

3)'

.

4\ '

5)

6) .

7)

s)

14 )

r-5)

soturloNs

To

vrorini

P'aPER

vl

.

.

r

,,

. . :

.

P.ART:.A,

, , . , , .

.1,

Number

f

solute

irticles

n

hesolution;

'

Solpbilitydecreasei

.

Zinc

'

Doublies

R

ncreases

y v,ro

imes

tiquid,fat

Sodiulnhydroxide

:

Radon'

CHj-Crt-CH-

on

2-chloropropane

R

isopropylchloride'

ct

Mettfanal.:,

:

NII,

'

.

I

PART-B

(i)

It

is hesmallegtpossible

epeating

nitof

a crystal

a,ttige'

iii

Th.

three

imeniional

nange-meiit

f he

attice

ointss

called'space

aiticc

Th cells

which onvert

hemical

riergy

f combustion

f fuels

nto

electrical

nergy

re alled

uel

cells'

Ex HJdrggp.ri

.qxygen.fuel.cell'

The

ime

equired

o gduce

he

oncentration

-of

he

eaclant

o

iulf

o1"tt

nitii

value

9called

alflife

eriod

f a eaction.

11 )

12)

l1 )

.

0.69J

t,;

l . . lnthanoicis

caf

$

t l :

va.tcl

hydrogen

as..

2Ln

+

6H,O-----+2Ln

0H).

' i lJ,

t

Diethyl

elher

eacts

vi lh

xcess

1'hYdrogen

odide

Lrndcr

rast ic oi l i l i lol rs

('

form

etlryl odide.

C2H.

O. C2Hr

2HI

-)

2C,H.. l

+

H, O

Becuuse

ceiic

cid as

n

electron

eleasing

CHr

Bro,p

rvhichnrakes

heO-ll

bond

5trongeraninotfavour,the

eleaseofH'ion

easily.

But

in

formic

acid

here

is no

such

group

an{

hence

elease

fproton;(H

*)

becomes

easy'

Antiseptics

re pplied,on

iving

issues

uch

s

wounds,.cuts

tc.,but

disinfectants

areappliedon on-living bjects uch

as loors

etc.,

(i)

They

produceioth

even

with hard

water..

(i i)

A3partanre

n alitame

on

saccharine.

PARr-9

(i)

Froth

loatation

n

oil'floatation

method"

(ii)

Inrpure ickel

s heared

ith

CO

to

get volatile

nickel

etracarbonyl

whibh

on urtherheating

ives apours

fpure

nickel

Nin

4CO

,r,'-t",

Ni

(CO),

.s,;fl,r

,

\i

*

4CO

a) zincreacts

vith

il.

HNor

to

fomr

zinc

nilrate,

waler

arldnitrous

xide.

4Zn

+

l0 HNO.

----'+

Zn(NO.)r

+

5H,O

+

N,O

,* '

. : .

. . .r, , . ,r

, . . ,1. ; . .1,,.

r ' l : i

.

.

, . : . . .

t l r

j i , ' I i t , .

1 , \rL r \L ,:) \ : ' , . .

I

l6 )

l7 )

l8 )

le)

20 )


5/41

, i r)_

'

33)

a) Simpte

ther

Mixed

ether

b)

OH

c)

35) a)

i) )

36)

a)

H

CH:OH

cg{,oIl

: .CHr-GCII,

taimcthvl

thcr)

n

Crllr-O--CrH,

{di"rhvt

rh"d

: CofrrtO-g11

methvl

henyl

rher)

n

CrHr-O-CHl

mcthvtethvlriher)

t)

O';mvo'

r2f4'

,

3.ri,O

i i i ) CHr=CHr-lHrO

.*, ' :sor.

)

CHr-CHpH

34)

a)

Wrcn

a

carboxylic

acid

s

heated

with

sodalime'

an

alkane

s ormed'

This

reaction

s callcd

decarboxy{ation

Ex: CHTCOOH+Naorl

+

cl{rcooNa+HrO

clircooNaf

NaoII

-:'o4

cHo+

Narco,

b)

Acctone

s

obtained

yareating

cetyl

hloride

with

dimethyl

admium'

2cl'lr co

-cl+cllr-Cd-cH'

--r

2cHr

co

-

cH'+9661'

Acctophenone.

Aniline s

preparedbf

rereductioncifnitrobenzqne

sing

in

and

onc'HCI

C6H.NO,

6[H1

s;c*xt

,C6H5NH2+2H]O

\'i.lir1,,l

ntin"

cecls

'ith

eicess

o{meth-vl

odide

1o onrr

dinrcthvl

arnrno,

ri rncl i ly l rnri rrcard

inal l l ' tc tranret l i i l

ntt) iott i t -tr l l

t t i i : ' i :

cHr

- NH,

+

cHrl

----t

{cHr)2

NH

+

HI

(CH.),

Nli

+

CH,l

,--+

(CH,)rN

+

HI

(Cl l r)jN' i -CIl : l

.+

(CHJ,N.: l

.

OH

,to. I 1rc,

'y-\1

lo I

\z

I

NO,

OB

b)

c)

37)

a)

i) Lysine on

ii) Haemoglobin

and

n

i i ) c

l 'o lyurr r i


6/41

rAR.T-D

3x5=15

ry

AnswerjanY

hree

6f

he

following

:

ir-'

;il-;;

"lement

fom's

gt '*:':Il 'ûnit

cell

ede'e

ength

eing

, 260

pm.

Calculate

hd

dcnsty

of

he

elenrent'

i

7*^1"

-""",^f

rhp elernerit:Z3dn rol,

N,=6

i A;ffi;;',i;t;r'"'"r*"*'*

-z:g/nor'

'=6'02T

-]

o); ficili-i'nu'"n

"o'tallirie

ol

'ls

'r

T:T::::,: I'l;

'

372

?8)

n)i

Disti+gurilhbetlveencrvstalillflesorru5

-rrru

dr'vrvrrwuJ

Y"-"'

I

a),i

A

solirtion,**

,"pui

ov

dissolvins'

*,o|.Y]l'::'^:

:l ] : 1f,'1:-';;

t

*

"*'

' lr

sur*lrurlrwa

'r

ei's'v-

*'r""na

to

'l"t

'

boiiing

oint

i

I00'340c'

The

rbsulting

oltttion

vas

^,-

n < v /L^/ nrnl

;;-#:ilr,',"*"rs"'"::: 5:i;A::"t:llY,if

t'

rn,

aru+r4rv

'^'Y^v

;

lr lsignif icance'gf

Henry's onstant ?

State"ft,lem.yip

aw

{hatit

.,

_,^_,-^r.,â,r^, r0 min wirh a

il;il;#

ff

"of

p..

.,,lpr'

te

s

elec

ro

vseo

:''

0,

'll]."]T:

*"a;i

"ir.,

o,.,.,p"...

vhat

s

he

mass

f

copper

eposited

t

he

," 1

D) ,

lq\ r)i

electrode?

atomic

masscoppcr'k

63)'-

u)'

p.nl"

ritiii''g

'nll*

tut'ductivity-

c|,'

I{owia1e

3apd*d.;;s

;;;-"i*"g;

s'a

9'*rof

he

ell

e{ated

l'

t*,]l

t

30)

;i

ino*

,f,u,

tie

ime

equiJtor

f%.contnlction

ia

irst

rder

eactron

s

I

twic6

he

ime

'"q''iJittlne

completion

0%

tthe

eactio''

bJwh;i i ' . | ' . "a"f i rstorderreact ion?Giveanexample.

31)

î

Writb

hree

pplications

f

adsorption'

3+z

U;

Wilut

s

a

protective

ol

?

Cive

an

xample'

|

4x5:20

Anlrvei

an1'

our

of

he

follo;wing

32)

t) Explain ittig'seacl'ion'

-

-

il

H'orv

o

yollconvert

dryl

alcohot

o

ethyl

hloride

2+z+

c)

What

s

racbrnic

mixture

?

-

3i )

^)

I rhenols

are

acidic

r " ' l r i l c

alcol iols

are

nei t t ral

Cive

ci isot ts '

i;

Uot"

:rre

he

bl lou' in.g

corrt

ersions

r l r r i cd

t l t '

'

i)

ketone

to

seccindarY

alcohbl

i i )

ethanol to

ethanal

. i i i )

diethyl

cthcr

to

eihl l

iot i ide

- -.. , . . , .r.--, ,r.-. ,

t* '

14)

a)

Horv

do

you

preparc

acid

chlor i ' l c

" t ' : i

t l l l : * t '

chlondc' l

.

Why

thionyl

clr lorir le

is

betler

rcagent

n

the

above

cactiorr

/

b)

Expiain

rdor

1o:;;;41

-l:'l-'i'*o'''

35)

a)

Completetlrefollowingequatron:

i)

R-Co-Nl,{,++911

ti l tH'

''

i i )

C6H5NH2+HNO;+IIC]

?

i i i ) '@-N:N-Cl+

@H

-

e --- ' ,

b)

Methyl

mine

s

strongerbasethan

m43nia,

Ynt-t. ,-^

3+7

36)

ui

Distinguish

enveen

brous

proteins

nd

lobular

roterns'

b)

What

happens

vhen

ilucose

eacts

ith^hldro8enl?ft*

2+2+l

-

c

Nanre

he

n

tiogen

ase,rhich

spresentonly

ll:Kr\

r

r

37i

oj

whutor.l,omopolltng;andco-polymers?

'

b)

What

s

vuilcanisattii

of.iubber

'

'

:

'

c)

Give'dnexunlp[iot"yothetibpolynrer

'

2+2+l

r )

SOt

UTIONS'".tp

oDEL

A

FIR

-

v

I

Pr\RT'.E

."\

solution havirig

owcr

osnrotic

ressure

harrhato

a

g vcn so

tll

o r

lry,potorric

olution"

Oxygcn

dissolved

n

u ater

5nT'

It

is

defined

as

thc

ratelofths

s3s1isn,

vhen

heconcctttratton

I

of

caclr

rci l( : l i l t l t

t'

I

_5 )

6,)

7)

8)

e)

l0) ,

l , l r

l _ i )

il )

BccauSe

ftheir

porous

tructure

l\,t

onrJ

s

process

Radon

2

.

bromo-2-nrethyl

roPane

Dui

to t l reassociat ion

f molecules

n

carboxyl ic

cid

hrotrgh

tl lcr

nrol t 'c t t l i t t

hydrogenbonding

-

Vitamin-A

,

PART-B

I

Contribution

y

corner

articles,

x8

=

'd

Contribution

by

bbdy

centred

particle

I

Tothlnri .ofpart ic les/uni t .gl l

|

+

I

=2

,

i \r

anode

Pb+io, '1

+

Ph.So,+2a-

..\tcath


7/41

Time:

3Hi

15min

N PUC

-

CHEMI.STRY

:

MODEL

QUESTION

PAPERvru

.l

'

::

. ' - :

. . .

r", , ,1

.Giye

an exanipli; foq

tie cdrryiound

fManganesewhere

Man ;anese

hows

-7

oxidation

tate.

Calculate

he magneticmoment f a divalent on,

M'2 n

aqueousolution,

f

theatomic.number

f M

is

25.- 1

+

2

G

''

Subject

gode.-:c

Max

Marks:

70

21'

4

b)

PART_A

I

A.ns\ 'erALl lhe

questions.ach

questions

arriesONE

mark:

I

Cive

nexamplc

or

a sol id

sol trt ion

n

ra'hich

olvents

a

sas'

]:

What

nnypertonic

olutions

?

1;; The

question

papelhas

four

Parts

-

A, B.

C'and D- Atl

parts are comPulsory'

2;t Write balancedlchemical

iquations

and

draw

labeled

d'ragrams

wherever

required'

3.r

us bg tables and

simpte

calculator

if necessary'

(

Use ot scientific

calculatori

is not

allowed

)

24,

a)

dmsng

queous

olutions f

Cu'2

ndZn*2 which nes

colotrrednd

why

?

b) Name

he

errorhagnetig

lementn the irst ransition#es.

2

+

|

25.

Write ny hree ostulatesf

,Lternei'S.theory

|

3

26. ir)

Wharaie

igands bive

anexample

or

anionic idenlateigand.

'

PART_D

IVAnswer

ny

HREE

questions.

ach.question

arries

rl/E

marks

3 x 5

:

I 5

27.

a)

Silver

rystallisesn fcc attice.f edgeength

f

he ell s

4.07

lFt cm

.

anddensityofsi lveris0.5gcm-r,alculatetheatomicmassofsi lver. 2

b)

What

s a sem iconductor

What

ypedf

extrinsic

eririconductor

s

ormed

when

Si l iconisdopedwithBoron?

2

Whatisthepackingeff ic iencyiriBec?

'. .

1

'What

is

eriri

prmeable

mbmbrane

Give

an

example.

2

Write he mathematical

ormof Raoult's aw

of

RLVP,Explain

hesymbols.

2

Define

molal defressionconstant.

1

Write

hediagram,half cell

epresentation

nd

alfcell eabtionfSHE.

3

What

s corrosion of metals

Mention

any womethodsf preventign

f it. 2

At

250

C,

ateconstant f a

chemicaleactions

2.4

l0r s-] .Calculatehe

energyof ct ivat ion,

f i tsraleconstants lx l0-3s-r

t400C.(R-8.314Jlmol/KB

Explain

he cffect ofcAtalyston

ateofa reactibn. 2

What re

adsorbate nd

adsorbenl?

'.)

Explain

he

pruparation

't

rr;eiulso]::

.r '

r l r, :r i r". lcctrrcalrc ihorl

(Jir

e i i i , icr t i i r r r l : lc

lL; hoi lr , : ' ,urrcrr ir . l l . r l- \ . ) , . , r

I

x 10

=

"I'od"nq

"n

t0

F.J

'

3'

)

write

dl

s.L.urlit

f rnolar

onductivity.

4-.

Flalf

i$lxriod

f

a'firsi rder,reaction

s 3

min.What

s

he

ime

equired

or

he

compl#ion

if

99.9%

lthe

same

ebction

AmonqAl l 'and

a2,,

hich of

these

s

hcbesl

oagulat ing

genttocoagulate

lood'l

Give

ieramplcora hal ide

re of

aluminiunr.

-r

.4

6r -,

'

c

N

a3A[

i'

c

Wiitconcuse

f

hcl ium. ' ,r

:

-4

ta\

\

con

fl

WritctlnIUPAC

ame f

the

comfound

Cl'tr)rCHCHCl,

hcctone

sconvcrtednto

propane

n

the

presence f

Zn-Hg

and

onc

lCl'

t t :rnrc

f lhiseaction'

5.

6.

7.

8.

9

What s

he

5 r

l { ) :2{)

2i

A

llorvs

5 x

3:15

..-

0

28.

a)

b)

c)

29.

a)

b)

30.

a)

b)

31.

a)

b)

c)

1,

t,

' :

i

I

,]

I

i1

I

1;

I 0 Nanrchc itaminvhichcauses bedise se eri-beri ue o rtsdeficicncy

I'AP.T_

B

1Iis l \

' f lnr

iYI- rucsl ion::.

: .rrc l r

trts{iorl

:t

' r ics 'f \ \ 'O

nr:rrks

1

1

Draw

diauranr'ofuni tell

oJ 'bcc.

lo* '

nr: i r l ) 'atonls

re

iesent

n t

1

I

2.

Calculatc

he

inre

equired

o

deposit

1.3

g chronrium

vhen

a

cuneni

f

I

t l rroughasolut ion

fchronri t trrr

l l l

I

sulphatc.

cq.

rass

fCr

=

l i l i )

lt .

14 .

l -5.

16 .

l't

.

18 .

20

l )c l lneordcrofa

crlct lon.

.i ivc

n cxlirl lplc

L)f c lo

or(ier

cactl0ll

Wri tc

nvrvo ropert icsl'

anthanords.

Crvg

mxxnnlplg

ach

br

i

rihydric

hcnol

nt l nrixet l

thcr'

Explain

tard'seacrion.

Whaiarcantiseptics

Give

an exarnple

Explainsaponification.

i

-

VAnsrver nyFOUR

questions.

Each

uestion arrics

i IVEmark

:

32.

a)

\\ tr i te

nv \\ ,o i f ferencc-.

etivccn

.r

and

Snrrcrctrons.

b) Lrpiain :ricric l

Cr

al i 's urcl ioi r

\

r i l r

s l ) et

rr

hluru1ranr., , . .

c)

Givean

xarnpleor a gerninal

ihal idc.

33.

a) Horv sphenol ranufactured

ronr

unrcne'l

b) How

does thanol

eacl

with

ethanoic cid

?bive equation.

c) Writ e he

general

equation

orWilliamson's

ether

ynthesis.

,

34. a)

Give

wo

tests o distinguish

ewben

aldehydes nd etones.

b) How doesacetic

acid react

with

aAjnmonia

?

Giveequation.

c)

Among hloro,

fluorb,bromo

cetic

cids,

which

s most cidic

35,

a) Explain

o{Thann'sBromamide

eaction.

:

b)

Explain

arbylamine

reiction.

c)

Give

he

gerieral

omrulaof diazonium altsl

36"

a) Write

Haworth strtrcture f a

non reducing

ugar.

b)

What

s denaturation fproteins

,

c) What

arenucleic acids? Writq

hqbiological

ole f

-RNA.

37 a)

Mention he monomersand artia lstructure f erylene.

b) How s

buna-N rubberprepared

G

vc equation.

c)

Give

anexample

or a natural ol1.'nier.

4x5

20

I

2

2

".,..

I

2' '

z

'1

2

z

I

2

I

2

2

2

I

PAITT-

C

III

Ansrver

any.FIVIIuestions.,ach

quest

on

ca rics

f

t REE

Marks

19.

a)

Name

he lux usecl

n thc

cxtract ion

lcast

ron rom

haenrati tc

re .

b)

Erplainone ef ining

re-t l rod

or

lrc

ptrri f icat ion

f

nretals '

'

a)

Howdoes

Cl, eact

wi t l t

rvatcr

b)

\. l t i tehe

onlula o{' thc

contplcx

on

orrrtecl

y

he

conrbinal ioriof

Cu' on nr. i

mnron

a

ntolcctrlcs

l -t2

2

I

2

I

2

I

2l

a)

Howdoesonc. -l ,SO,

eai t

i ' i th

oppcr' ' /

ivc

cqLri rt iorl

. .

b)

Name

he

roducr

on'ccl

u,hen

u

'hur

tl

ox tlc

eacts

vith lrlorine

as

L2'

r,)

Howischiori ; ie

rcpalcd ronr

otassiLtm

ctnrattgarlatc '/

b)

Wliar

s

aquaLegia

$L

63


8/41

EF{EM]sTRY

Time: 3 Hours

15 Minutes

General

nstructions:

il

The

question

paper

has four

parts

A, B, C and

D.

iil Write balanced

chemical

equations and

draw labelled

diagrams wherever necessary.

Max.

Marks: 70

Il

AnswerAllof

the following.

Each

question

carries one

mark.

[Answer

each

question

in one word orin onesentence]

1l Whatis

osmotic

pressure?

2l Whatisaprimarycell?

3]

How does tr,, of a second

order reaction vary

with initial concenffation

of the reactant?

4l

Name the

catalyst used for the oxidation

of

6f What is

the

structure

of

XeF6?

What areenantiomers?

How many

particles

are

present

n eachunit cell of

aFCCcrystallattice?

9l Write the IUPAC name

of the

organic

product

7l

8l


9/41

171

What

are

functions.

"Histamines"?

Give

some

of

it s

l8l

\\-hat

is copolymenzation?

llustrate

with

an

eramDie.t

iiil

AnswerANY

FM

of

the

follouing

[Each

question carries

3

marks]

1el

201

2rl

22)

Explain

the

terms

calcination

and

oasting

with

suitable

examples.

Dry

chlorine

(in

a

imited

supply)

s

passed

ver

heatedwhite phosphorouso form acompound

X.

X

is made

to

react

with

ethanol

to

form

an

organic

compoundY.

Yis

heated

with

an alcoholic

solution

of

KOH

to

form

an

organic

compound

Z.Identrfy

X,

Y and

Z.Wite

equations

or the

reactions

nvolved.

How

is

ozone

ayer

useful?

Explain

two

factors

that

pose hreat

o

the

ozone

ayer.

Complete

he

ollowing

equations:

I

Fz+ZCl-

-+

231

il

Calculate

he

magletic

moment

of

Fer+

ion'

iil

The

electroruc

onfiguratio

of Cr

rs 3d5

4sr

instead

f

3d4

4s?

Give

easons'

iiil Namea ransitionmetal

hat

does

not

exhibit

variable

oxidation

states.

Write

ionic

equationfor

the

reaction

of

permanganatewith

il Oxalateions

n

acidic

medium

i) Fez* ions n acidicmedium

UsingVBT,

account

or

the

geomeny

and

magnetic

property

of

INiCI+1Z-

given atomic

number

of

Ni

=

28.

241

2s)

261

Give

he

UPAC

name

of

lPtCI2@n)

2lCl2'

Draw


10/41

301a]

The

velocityconstantofafirstorderreaction

\+'as

found to

be

1.2 o-a

s-l

ancl

2.4x10as- l

at 300K

and

at 3l0K

respectively.

aiculate

he

activation

nergy

givenR= 8.3 4,IK-rmol-r

bl

Prove

hatthehalftifb

criod

fafirstorder

reaction

s independent

f the

init ial

concentration

fthe

reactarrts.

L3

+2]

3

I

a]

What is

peptisation?Describe

he

preparation

of

a

positively

chargedAgl

scl and

a negatively

charged.

gI sol

from

.4gN03 solution

and

Klsolution.

bl Explain

tlte temrs electricai

double

ayer

and

zeta

potential.

[3+2]

32]

a] Mention

he

rnajor

product ormed

n the

followingrcactions:

d

Propene

s

treated

with diborane

ollolved

byoxidation

sing

hydrogen

eroxide

n

an

alkalinemediurn.

iil Nitriles

arehydrolysed

n the

presencef an

acid.

iifl Sodium

henate

s

heatedodomethane.

Answer

AITY

FOUR

of the

following.

[Eaeh

question

arries

5 marksl

3sj

al

b] Givercasons:

il

Aryl halidesare

extremely

ess eactive

towards

r:cleophilic

rrbstifirtion.

i{

An elecmrr

withdrawing

roupncreaseshe

aeid

strength

of

phenol.

[3+2]

A ketone

is treated

with

hydrazine

to

form a

cornpound

X. X

is

boiled

with

KOH in ethylene

glycol

to formY.

What are

X andY?

Name he


11/41

EMISTRY

EI

il

f

Vax.

Marks:70

imc:

3 Flours 5

Minutes

Generul nstructions?

i] The

question aper

ras our

parts

A,

B,.C

andD.

ii]

Write balanced

hemical quations

nd

draw abelled

iagrams herever ecessary.

Il Ansn'erALL

ofthe following.

Each

question

arries

onemark

[Answer

each

question

n

onewordorin

onesentencel

I

I

What s

heunit ofthe rate

constant

or

a irst order

reaction?

21

Give

anexample

fa network

olymer.

3l Define

frrel

ell.

4l

What s he

dispersion

hase

n

a

gel?

Why is -lelium

used n filling

air shipsand

balloons

for wcalher

shrdyz

What

s

the

gencral

electronicconfiguration

ofthe

3d series?

Name he

most suitable

oxidising reagent or

the

conversion f

a

primary

alcohol o an

aldehyde.

6l

1l

8l


12/41

iiilAnswerAIIY

FM

of the

ollowing

[Each

question

arries

3 marksl

:01

'1

1l

-r I

,9] Describeheextraction f

Aluminium

from

purified

Alumina

Explain

he aboratory

method

or

the

preparation

ofdinitrogen.

Explainwhytransitionmctalsand heir compounds

showparamagnetic

ehaviour

and

alsocalculate

the,magnetic

moment

ofa

divalent on

in

aqueous

solution fits

atomicnumber

s

26.

22] How

does cidified

rotassium

ermanganate

eact

wittr

d

lron(II)ion

if

Oxalateion

rnl

HzS

Write

ionic

cquations

or

the

reaction.

231

Mention

he

conditions

equired

o maximise

he

yield

of

ATf3

and write

the flow

chart

for

its

manufacture.

24]

Write

any

hree

postulates

f Wemer's

heory

of

co-ordination

ompounds.

25]

On

the

basis

ofthe

valence

bond

heory

explain

why

[co(

NH)o]3*

forms

an

inner

orbital

complex.

261

Explain

why

F2 has

a

smaller

enthalpy

of

dissociation

ompared

o that

of

C

2?

Answer

AI\Y THREE

of

the ollowing.


13/41

33_l l Write

the rnechanism f

dehydration

f alcoh l.

bl

How is anisole

prepared

rom

phenol?

[3

-

2J

3a] a] Explain',vlrymo*ochloroacctic cid sa shonger

acid hanaceticacid.

bJ Vttrat

s cross

ldol

conclensation?

rring

cross

aidolcondenraiio& ince le reactents

ontain

cr Hatcnrs,

xrw

many

roduc,ts

ill be srmed

ir:alrrixfire?

c.l F-lannehe reagentused

n

Clemmenson

reduction.

[2+2+lj

(iirc

a rcason:

Although

the arnine

group

s an

O ad

P directing

group,

aniline

on

nitration

Eats

a

r$stantia

arnountof

M-niftoaniline.

De$nt'e

tbe carbylamine eaction.

.frra:g

the

tbliowing in the increasing

order

ofrtbbasc

strength

c6//

Ans:

l

F,+2Cl- -+Qr+2F-

iil

2Ca(OH)2+2C12+

Ca(OCl)2

+CaClt

+2tl2O

iiil

N//r

+3C12-+

NCls+'.l.flCl

231

il

Calculate

he

magneticmomcnt

of

-1.r ,

, toD.

3rl54s1

nstcad of 3cl4.tz

Civc

rcasons.

i i i l Namea transi t ion

metal hat

docsno t

.exhibit

ariablc oxidation

states.

Ans:l

tt="[,fu*r= qs.A

Jts s.gzau

irl

3ds4rl

has xtrastabilityduetoalffilled

subshclls

iiiJ Zincor Scandium

any

one]

241 Wri te ionic equation

or

the rcaction

of

permanganatc

vith

i | Oxalate ons n acidicmcdiuur

iil

Fe2+

ons n acidic

mcdium

-->

Mn2++ 8I{.,o + oco2

iil

5Fe2+

Mnoa" +8H+

-+

MnZ*

+ 4H

ro

+ 51'c3+

251

Using

VBI

account

or

thc

geomctry

and

magnetic

property

of

[A' iCla]2*

givcn

atomic umbcr

of Ni

=

28 .

Ans: Nickel s n

+2

oxidation tate. he

orbitals

ll

Ni2+

on

are:

n[r

One and hrcc

orbi tals r.

t

yt

ria;r.a

,.r.1

thereforehe

hybridisations spr.

Consequentll,,

he compiexhasa tctrahctiral

geometry.

^

...)r

The

configuratrrrn

f-

Ai ' '

J I i ' r acccpl

rg

electron

airs lom ligands ccorrcs:

P and

P

are he

partial

apour

t

l r ' t

tul l l r

r

t t r

"

r'

1 'r '

"

l

' i ' l


25/41

1l

t l 1I

T

t

Four

c-

Pairs

iom

4

C/-

on s

1'he

complex

s

patamagnetic

ue

o

th e

Presencc

f2

unPaircd

lectrons

i'ZOf

Cin.

thc

UPAC

namc

of

IPtC'12@n)2lCl t

Draw

cis

and

trans

isomers

of

7Ptcl"(cn)12+

on

and

thc

dextro

an d

lacvo

orms

of

the

cis

orm'

Ans:

Dichloridobis

(ethane

i,

2-

diamine)

piatinum

lV) chloride

T

(.t

-1z*

[

ct

12*

I

t , .r ,

l ' 'x j f- i ' l

lal i '--. I a' i" I

l'"J\_,/ | I

b,,J

__l

,

Dextro

Laevo

'

is

-1.

I

c/

l ' -

l rt

i"r--i,:),,

|

'.--U

t-,

I

LCII

trans

271

What

s a

crystal

attice?

Draw

the

unit

cell

ofa

body

centred

ubic

attice

and

calculate

the

packing

efficiency

n

the

BCC

crystal

latt ice.

l5 l

A

ns

A rcgular

lucc imcnsionalrrangementfpoints

in spacc

s

called

crystal

atlice'

BCC

unit

cell

ln A

DIiD

b2

=c,2

a2

=2a2

a s theedgeength

b

is hc

ace

diagonal

In

AAFD

E

)L1 )^1^2

t'

=

t l ' '

l t '

-

t t"

I

lL t "

=

)( l

c

s

he ody

iagonal

r: ,

. .c=Vjxa=4f

r is

he

adius

f

thc

sPhere

1r

ut"F

J3

An

unit

cello1u

gClC

rystal

attice

ontains

2 spheres.

lbtal

olume

f

he

unit

ell

nil DrflI

',

(qr) '

lJ : i

Packing

fliciencY

Volunte

cctrPied

Y

2 sPheres

.

^^

-

x

twv

Totalvolume

f

the

unit

cell

z*( ln

t\

=

\3, / *1oo=68%

[

+') '

tEl

al

Thc

vapour

pressure

f

pure

A

is 70

mm

of

Hg

at 25

oC.

It

forms

an

ideal

solut ion

with

B

in rvhich

thc

mole

fraction

ofA

is 0.8.

f

the

otal

vapour

prcssure

f

the

mixturc

s 84

mm

of

Hg

at 25

oC,

what wi l l be

the

vaPour

pressurc

of

Pure

B

at

the

samc

temPeraturc?

b

What

happens

o

the

solubility

of

a

gas

in a

liquid

with

increasc

n

pressure?

Writc

the

narnc

and

statement

of

the

law

on

which

Your

answer

s based'

[3+21

281

bl

A

s

pressues

fA andB respectively.

l)

,

and

',,

arcvapour ressures

fpure

A and

pure

B respectively.

.r'1 and

xg are

he

mole

fractionsof

A

and B respectivelyn

the

iquid mixturc.

If

the mole ia ctionof A is 0.8, hen he

mole

raction f B

:

0.2.

Vapour

plessure

of the mixture

:

P.,t

+ pB

64=xAp,+xBpB

84

=

(0.8)

0+

0.2)

",

84=56+0.2

p' s

o"

=

28

=

140

rmofi le

0. 2

Thesolubility fa

gas

n a iqu id

ncrepses

wi lh

ncrcascn

prcssure.

t is based n

thc Ilenry:5 Law which states

hat the

solubilityo1 a

gas

n

a liquid s directly

proportionalo thepressure fthe gas.

Calculatc

he

standard

cmf of

the cell

at298K

n which thc ccll rcaction sl

^ ^,+

.-2+

Cu6r+2Ag-

pn,

-+ Cu'-

gq)+2Agr1

Given

he equilibrium

constantof the

reactions

3.92x1015.

What is limiting

molar conductivity?

State

Kohlrausch's

aw of nd cpendcnt

migration

of ions. Illustratc

the larv

rvith

a suitable xample.

[3

+

2]

^

n nsql

E.u., ,rt

Y

logK... at

298K

0.0591

1

log

-1.92

0' '

--046V

Limit ing

nolarconductiv i ty

s molar

conductiv i ty

f

the solut ion

when ts

c:oncentration

s zero.

Kohlraush

aw of

indcpcndcnt

igralion

f

ions

stateshat

thc

l ini i t ing molar

conductiv i ty

f

an

291

al

Ans:

a]

bl

Ans:

a]

Ps=x,qP,and

Pn=xaP,,

Fffiffi

l l t r ' i t r , l t r t , l t t . t l , , ' r r lr r l1,r , ' , , , I r i , , ,

l

c: t l iot l t , l

l l r t

i l r , l r , ' l ' l '

l ;gr cxir t lplt ' ,

rl

/

t'

,

. r r , , l

thc

l inr i t ini l

l l l t l l l t t

, , ' t t ' l t t '

l r r r l

'

"i

and

C/-

rcspccl ivr-11',

l l t l t t

l l t r

l t t r r r l I r r '

molar

conduct ivit) 'ol

Nrr( ' /

t

'

l ' rv '

rr

l' "

.0 r0 r0

Lm=LNa.',r "r l

301 al The vclocityconstant f

a

l l rs l rrrrl l r

reaction

was

ound

o bc

I

.2 0

'.r

'

and

2.4

I 0-a

--l

at

300K

arrd

at 3

0 K

resp,ect ively.

alculatc

he

aclivltion

energ/

given R

=8.314

K-'nol- '

bl

Provc

hat he

hal f l i fc

pcriodofa

f i rst

ordcr

rcaction

s

indepcndcnt

f thc

ini t ial

conccntrat ion

f

the

reactants.

t3+21

. k.

[ .^

( t"-T,\

Ans:

al

los- l=

"

l- I

K1

z)u)

^\

/ l r2

/

.

2.4x10{

E,,

r3 l0-100)

l ^o

--:

Yi - l

' "o ' . t" 'o '

: lo3{Bl14

t '3oo*I lo/

E^

l0

l^c1=-----L-

' -c-

2.303x8.314

oo.l lo

0.3010

2.303

8.314

300

3

0

10

=

53,598

nrol-t

=

5J..6

J

mol-'

I

When

=t172

[Rl=;[R]6

I

For

a irst

order

eaction,

.

2.103

l f io

l . i ( ] i

,

[Rl ,)

k

=

-

lr),1

--

iu :

_-

|

' lRl

1.7

-ltat.

2.303,

^

2103,, , . , ,

=

:'

log

(

0.J(,

0)

I t /2

t l i2

_

0.693

tt tz

Ea

bl

f--oiet

dispenion

medium

n

he

presence

fa

small

.f

otolyte'

The

electoll'te

used

bl

Pisasecorldaryalcohql

s a

ketone

i

EWG

enden

henoxideon

more

table

due

o effective elocalisation

fnegativc


26/41

U'A

'fhis

expression

oes

not

contain

he

erm

inI

wf

"ft

impfies

hatthe

half

ife

period-

of

a

first

order

eaction

s

ndependent

f

the

nitial

concentration

f

the

cactants'

3l l

al

What

is

peptisat ion?

Dcscribe

hc

preparation

fa

positivcly

harged

gI

sol

and

a

negatively

chargetl

AgI

sol

from lgN03 solutionandKI solution'

bl

Explain

thc

terms

clcctricat

doublc

laYcr

and

zeta

Potcntial'

[3

+

2l

Ans:

a.l

Peptisarion

s

a

process

f

converting

freshly

prepared

precipi tatt

1L".,

colloidal

olution

y

shaking

t

wm

tne

*i*t

oi*

fol

his

process

s called

he

peptizng

aSell

*t *

,lg,Vn.r

olution

s

added

o

KI

,olution,

h"

p.ecipitatedAgl

dsorbs

-

ons

lrom

he

dispenion

medium

esulting

n

he

fo.rnution

iu

negatively

harged

olloidal

Agl

solution

When

KI

solution

s

added

o

AgNo3

solution,

positivcly

charged

gl

sol

is

fonned

due

o

adsorption

fAg'

ions

rom

disPcrsion

edium'

bl

Thc

combination

f

wo

aycrs

f

opposite

-'

.ttg.,

around

he

colloidal

particle

s

calli

Helmhottz

electrical

double

ayer'

The

potential

difference

between

he

ixed

tuy.i

tta

the

difffrrsed

ayer

of

opposite

c-harges

s

called

as

elechokinetic

potential

or

zeta

Potential'

Mention

the

major

product

formed

in

the

ollowing

eactions:

Propene

s trcated with diborane

fol lowcd

bY

oxidation

using

hydrogen

Peroxidc

in

an

alkaline

mcdium.

Nitri les

are

hYdrolYsed

n

th e

presence

f

an

acid'

i i i l

Sodium Phenate

is

heated

iodomethane.

Writc

the

structural

eprcsentation

f

S1'12

mcchanism

sing

the

hydrolysis

of

methYl

bromide as an examPle'

[3+21

following:

il

Rcimcr

Tiemann

reaction

iil

Fifiig

reaction

Oxidstion

of

a

comPound

P

gives

a

prgduct

Q

which

reacts

with

PhenYl

hydrrtine

but

does

not

answer

thc

silvcr

mirror

tcst.

Name

hc

compounds

P

and

Q'

[3+21

331

al

321

al

I ct io

>>l

ll

\,2

Srtic\laldeh{de

iil

bl

-+

ONr

I cHrl

"',,"

Y

r:::+

I ll

\-2

otl

Ans:

al

l

tu l- ?r"

A

srg"l

-\"^

L__

r

arr.xrHl

\rlJ

l 'henol

lrterme(ls.c

Ans:

l

i]

ProPan-1-o1

iil

atniat

or

carboxYiic

cid

iii.l

Anisole

-a

,t-i\

onrhs

(/

\{

\)r:N.x

DiPhcrl'l

. ,H

HTI

tt

bl

EoH.u>Be{Ho.:1-n

:7

LFI 'H

n

Write

equrtions

E@

,l*no{

-r,.u,

I

\i'

ru@

341

Q

al

Wri tc

cquations for

each of the

followingr

i | [ tosenmund

reduction for the

preparation

of benzaldehyde,

iil, Aldol

conQcnsationaking ethanal

as an

.*u-lrl.,

iiil Decarboxylation.

Q

Gire

rcasons:

i l Aryl hal idcs are

cxtr"emcly

es s

rcactivc

towards nuclcophi l ic

substitution.

ii l

An electron vi thdrawing

gr0up

incrcascs hc acid

strength of

phcriol.

[3

+

2]

Ans:

a]

i l f i l i

Y"1, ..

pdirrrsor

Atdi'.>,l . l l ' '+H' ----i I l l rr+ lL /

\,2

\/

'

,Bmznylchloridc

Benayldchtde

iil

:

i. ,

ail-

NaOH.

2CH3

CIIO

\

-\

CH1-C.H

L:H2-CHO

Ethanril

'

d,

.r_"r[:xli,,*d

-4=-Cn,-CH

=CH

CHI

-H.O

-- ' )

'"

-

Bul2-enal

(Aldol

ondensation

roduct)

iiilR -

COOH

+

NaOH + R

-

COONa

+

I-I2O

Ccfr

R-COONa+NaOH-*" R-H

-

*

A llydrcruhn

Sodalime

+

Na2CO1

bl

I

TheC-Xbondacquiresadoublebond

characterue o resonance

nvolving

a one

air

of electrons

n X.

charge.

35]

al A kctone

s

treated

with hydrazine

o

form a compound

X. X is

boiled

with

KOH

in

ethylcne

lycol

o orm Y.

What

areX and

Y?

Name he

eduction.

bl

Arrange

he ollowing n

the ncreasing

ordcr

oftheir acidic

trength n aqueous

rncdium:

cetic cid,

monochloroacctic

acid

and

propanoic

acid.

Give

on c

rcason

or the trend

observetl.

[3+21

Ans:

a] X is a hydrazone.

Y is a

hydrocarbon.

It is Wolff-Kishner

eduction.

:l

'

KoH/

:

-"

=

n

utt*'rl

)c

=

u-lru,

thvlene

lycol

,,.-

"

_H.Ci

,/-

heat

\ ^ , ,

,, ,

. / 'un1-

tr2

i

b] Propanoic acid < Acetic acid 2i , tn2+

+8I1"O+ 55

.1,

(

231

)

Mcnti


29/41

In a

molecule

he

nter-nuclear

two

fluorine

atoms

s small

and

he

distance

between

pair

ofelechons

s

smaller'

27)

al

Calculate

the

packing

efficiency

in a

body

centered

cubic

crystal

(bcc)'

bl

What

type

of

stoichiornctric

efect

s

shown

by

ZnS?

14+r l

al

Packing

flioiency

n

a

bcc

crystal

G

ln bcc

Volumc

ccuPied

Y

2

sPhercs

n

Dij=

=-.---

' '

' fotal

volume

f

uni t

el l

Ib calculatchevolumeof the

In AEFD,

b2

=o2

+,r2

=2cr2

C2

=oz

+b 2

o2

+2o2

'. 'b2

2a2)

c

=

J3a

u1

c

=

4r'=

VJ a

r--Tl

l . ' .

=

-= l

I

vl l

1

-'-

olurne

f

the

cube

=

a-

unitccll

lPIr

68%l

(

a ') '

\Jrl

A^

z\-

Tr

.pp=

3

,x100

(q

\'

l -n ' I

\vr , /

'

Volume

f

i sphere

4r

3

repulsion

mong

he

one

airs

f electons

n

he

Fr

molecule.

(

onr'l

...Volumeof2spho.t

2*; )

Frenkel

defect.

State

HenrYts

aw

and

mention

two

important

aPPlications.

Givc

hvo

diffcrcnces

ctwcen

an

idcal

and

non-idcal

solution. [3

+

2]

Hcnry's

Law:

Statement:

t

a

givcn

temperature

he

solubility

of

a

gas n

a

liquid

s directly

proportional

o

he

partial

prcssure

fthe

gasabove

he

solution'

(or)

l. .dt

',-

. , , , , ,

q^;DI,

the

usting

ofiron.

Calculatc

he equilibrium

constantof

thc

rcactlon

Cu19+2Ag-

.:

Crrfo,+2A961

Given

E[",

=0.46tr

[3+21

Mcthods

f

prcventing

orrosion:

il

By

painting

ii l l ly mctall ic oatings Galvanizing,

finning)

By making

alloys

Cathodic

rotection

wkt,

-o

0.059

f , r "11

=- lOflk, .

o.ou=

ln,"n

o

2

*'

log t"=15.6

r-----.----:;1

l i . .=3.92x

o' '

I

A first ordcr

rcaction takcs 40 minutcs

Ior 30Todccomposition.

alculatc

i.

Definc threshold energr.

14

+

1l

lRlo

=

100'

t

=

40min

lRl=100-30=70

bl

bl

281

al

Aps:

a]

bl

i i i l

ivl

l

Ans:

a]

The

partial

presswe

of

the

gas n

vapour-

phase

s

proportional

o

the

mole

raction

of

the

gas n the

solution.

Application

d

To

ncrcase

hc

solubility

of

CO2

n

soda

water and

other

soil

drinks,

he

containers

are

sealed

nder

high

Pressure'

Io avoid

ends,

cuba

ivers

re

rovided

with

tanks

illed

with

air

diluted

with

Helium.

bl

ldcal

solution

Non-idcal

solution

K= ? tn2

=?

Forafirstorderreaction.

..

2.303.

n. l

^

-_tosl i

I

/

-LRI

2.303 100

=-tog-

40 '-" 70

301

al

6

Ans: a]

Obey

Raoult's

law at

all

tcmperature

and

concentrations.

The

A...

B

interactions

re

of

thc same

order

asA..,AandB

...

B

interactions.

AV..

=0

mlxtog

A

H,o.,

=

o

Do

not

obeY

aw

at

all

temperature

and

concentrations.

The

A...

B

interactions

re

not

of

the

same

rder

as

A...

A

and

B .. .

B

interactions.

AV.

*0

fttxln8

AH

..

+

0

nrilfig

321

al How do

you

convert

chloro benzene o

biphenyl?Name the

reaction.

bl Explain

Finkelstein's

reaction with an

example.

[3+21

Ans:a]

When

hlorobenzene

s

heated

it h

sodiumn dry ethcr

wo aryl

group

oin

together

orming

iphenyl.

Er6 Et ilt

ffiIm

bl

0.()()

t l l2

*

-

,.

0.691

8.906? 0

r

E=-uiqll

The

minimum

encrgy hat l rc rc lcl i rr l l

molecules

usl

posscs

n ordcr

o l i rrrrr

productss called hreshold ncrgy.

Dcscribc omc calurcs f

cntalvsis v

zcol i tcs.

Givc rcasons:

inety ividedsubstances

are morc

effcctivcly absorhent

ha n

thcir crystalline

orm.

[3

+

2J

Zeolites

re

good

bape-selective

atalysts

because

f

their honeycomb

l ikc

structures.

They

are microporous

luminosilicates

with 3-D network

of silicates

n

which

someSi atomsare eplaced y A/ atoms

giving

an A/

-

O - Si

framcwork.The

reaction

aking

place

n zcolites

depend

upon

the size

and shapeof the

reactatt

and

product

molecules,

as

well as upon

the

pores ndcavities fthe

zeolites.

The

extenlof adsorption

ncreases

ith

the increase

of surface

area of the

adsorbent.

hus inely

dividedsubstances

having

arge surface

reas

make

good

adsorbents.

3l l a l

bl

Ans: a]

bl

Fittig

reactron

Fittigreaction

O*@"*',@@*'"u''

b]

Finkelsteinreaction:

When alkyl chlorides

or)

bromides

re

biphenyl

trcated

ith

Nal

in

dry

acetone'

alo.gen

rvithdrawing

oup. An

electon

withdnwing

the

stabi l i tY

ol

th e

ffrq

a]

Iaworth

tructue

or sucrose

bl Define

thcrmoplast ics

and

thcrnro-

polymers.

+

2l


30/41

cxchange

akes

placc

fornring

alKyt

iodide.

R-

x

+ Nu[-o"tnnu

>

R-

I

+

Na x

C\-Ct+Nal- YYL+CH'

-

I

+NaCI

331

al

Writc

the

mcchanism

f

acid

catalysed

dchYdration

f

alcohol'

bl

llorv is anisolcprcparcd rom pheno ?

[3+21

Ans:

a]

Mechanism

f

removal

f

watsr

ro m

alcohol

acid

atalYsed)

I steP:

H+

t,

C

I

3C

{

20

H

JL

c

I-t

3cH

z

-

oH

2

tsl

+

CHi-CH1-OHz+

CII3-CHz

+ lrO

II

steP:

+

cu.+Zu,

-+cHz=CLIz+H+

ONa

*oot-,

---'@

*

H,o

OLI

bt

lol+

l-l,l.f/

al

bl

Ans:

al

Monochloro

cetic

citl

s

a

stronger

he

u.iJ

nun

..ti.

acid'

ue

o

he

I effect'

where

Chlorine

cts

as

he

elcctron

^Olu

,,.-,-/O

-CH]

fol t l -cH.--) l

CJ+Nrt

\--,

-

\.,-

Anisole

Exptain

why

monochloroacotic

cid

s

a

strongcr

cid

han

acctic

cid'

What

is

cross

aldol

condcnsation?

I)uringcross ldolcondcnsation'ince

both

he

reactants

ontain

cl

I{-atoms;'

hol

many

products

il l

bc

ormed

n

a

nrixfurc?

cl

Name

hc

eagent

scd

n Clcmmenson

reduction.

[2+2+11

eroun

in.r.a.es

Jarboxvlate

nion

and

hence

ncreases

he

acidic

trenglh

f

carboxylic

cid'

1{ l

9.,

bl

When

aldol

condensation

s

carried

out

between

rvo

different

aldehydes

nd

or

ketones

it

is

cal led

cross

aldol

condensation.

f

both

the

compbunds

contain

r

H

- atoms,

t

gives

mixture

of

four

Products'

c]The eagentsednClemmcnson'seactions

Zn

Hgi

Conc.

-lC/ '

'i

a|

Give

a reason:

lthough

he

aminc

group

is an

O

and

P dirccting

group,

nilinc

on

nitnation

givcs

a substantial

rnount

f

M-nitruanilinc.

bl

Dcscribc

hc

carbylaminc

caction'

c]

r{.rrangc

he

ollorving

n

thc

ncrcasing

Ans:

a]

orqler

of

heir

basic

strength

C6l is

NII1,

CH3NHt'

NHt'

12+2+11

Wl:en

ariline

is

reated

withconc'

/INO1

and

conc.

l

;O4,

aniline

s

protonatedto

form

au

anilinium

ion

which

is

ileta

directing.

Tlierefore

n

addition

o

th

orthc

ind

Para

derivat ives'

mdta

derivativcs

re

also

ormcd'

bl

Vhen

primary

amlne

s

mixture

of

chlorofbrm

KOll,

isocYanide

aving

heated

with

a

and

alcohol ic

an

intolerable

cl

'11,.,''

bl

smell

s

ormed.

R

N 'l

)

+ C

Li('

4

+

3

KO

H

-+

R- NC+3KCl 3H2O

(611

5NI1).

NH1.

:H3NH)

Wri tc

thc

I laworth

structurc

fo r

sucrose.

Mcntion

he

biological

mportancc

f

RNA.

[2

+

3l

trmsq

@$ w

F

fl'oq Y

rif:::

-

r '

sefting

[3

bl

TheBiological

mpoflance f RNA:

There rc

lree ypcs

f

{NA in

accll which

play n mportantole nprotcin yrthesis.

Theyare:

n-RNA

+

Carries

message

iom DNA

lor

a specifi

protein

ynthesis.

r.RNA -+

Provides he site or

protein

synthesis

/-RNA +transferAmiiro

cids o

hcsiteof

protein

ynthesis.

Write a

note

on

the

vulcanisaticn of

rubber.

Dl

Ans: al VulcalisationofRubber

Natural

ubber

s soft and st icky.

ts

propertiesan

be mproved

ndmodified

by he

process f Vulcanisation.

Vulcanisation

s a

process

f

heating

natural

rubber

with

S-porvder:

t

a

temperature

etween 73k

and

415k.

Sulphur

reacls wi th the

polymer

molecules orming a cross l inked

network

which

gives

meshanical

tre

glh

to rubber.

bJ

' l 'hermopiast ics

are

inear

or)

s i ight ly

branchcd

polymers which can bc

repeatedly

oftened

on heating

anci

hardcned

n cooling.

Thermosctting

lasticsare closs

inkecl

and heavi ly

branched

polYmcrs.

On

heating,

heymould"

become

arcl,

n-l,rsible

and

herefore

heycannot

e

ecycled.

wltr t t : :

ri it

clls.'lhr:rt'fore.

"1,

"'

n1't

o'un'


31/41

it

i

Vapoiir

Pressure.

Ans:

Raouliis

arv

tates

hat

he

elative

owering

f

- -

uupouipr.ssure

s

equal

o

he

mole

taction

f

Zl

Narnclhe

rganicproductformcdrvhen

hcnol

is

rcaied

with

excessof

romine

water'

Ans:

2.

4. 6

-

TribromoPhenol

Silicon

and

Germanium

are

rcfincd

try

State

Law

of

Relative

Lowering

of

Zonerefining

Write

he

UPAC

name

of

Acetophcnone'

Phenylethanone

the

hydrides

ofgrouP

15

elements?

BiH3.

The

SRP

valucs

of Al

and

Ag

arc

-

1'66V

and

+0.80V

rcspcctivcly.

Which

of

thcsc

s

a

more

Powerful

reducing

agent?

Aluminium

What

will

happen

o

the

half

life

pcriod

of

a

first

ordcr

rcaction

if

the

ternpcrature

s

increased?

l'he

half

life

period

of

a

first

order

reaction

decreases,

f

the

empcrature

s

ncreascd'

What

type

of

magnetic

behavior

s shown

bv

thc ScJ+

on?

A

BCC

unit

cell

has

comers.

/ l\

.

8

":

I

I

atom

s

prcsent

n heunit

ell.An

\

U/

atom

t

he

centre

fthe

body

ofthe unit

ccll s

not

sharcd

ith

anyothcr

unitcell.

This

particle

as

a

whole

belongs

o

he

unit cell.

.

lbtal

numberof

articlcs er

unit

ell

=

2,

Give

casons

or cach

of thc ir llorving:

il

Bcnzaldchydc

ndcrgoes annizzaro's

rcaction.

Benzaldehyde

ndergoes annizzaro's

reaction

ecause

t hasno

a

hydrogcn

--

atoms.

ti

. , ( , \1",

l t \ l l

..0

" '1t ' t ' '

t

1

s

l l c s l i l l l ( l i l l

l

' l r ' t t r

"

'

1

' l '

r 'r '

R

is heutl ivcrsal

grts

ot

slirtl

T

is hc absolute

cnlPcrattlrc

n s

he chargc


32/41

M

3d 6

clcctron

airs

rom

igands

ecomes:

i I

TI

il

Ti

r i l t l

(r

pirirs

of

electrtrns

l'rorn

i

Nl

l,

nrolccules

'fhc

gcometry

fthe

complex

s octahedral

ue

to tlz

sp3

hybridisation'

The

conplex

s

lianagnctic

due

o

he

absence

of

unpaired

lectrons'

the

eactions

aking

Place

are:

C

+

CO2

>

2CO

FeO

+ CO

-+

Fe

+

CO2

Limestone

decomposes

o

CaO

which

femoves ilicatempurityasslag'

Gl

Draw

a

neat

abcl lcd

iagram

of

thc

Blast

\J

furnacc

and

cxplain

hc

reactions

nvolvco

in

thc

cxtract ion

of

cast

i ron

from

hacmati tc '

Ans:

In

the

blast

furnace,

hc

reduction

of

iron

oxides

akes

place

n

differcnt

emperature-

,ung.s'

t'tnr

air

is

blown

from

the

bottom

of

the

furnacc'

Coke

is

burnt

to

gtve

a

i"tp..**.

upto

2200K

n

the

orver

ortion

itseif,

Thc

CO

and

heat

ormed

moves

o

the

uPf.,

Purt

of

the

furnace

where

th e

t.tp"ruturc

is

lower'

The

iron

oxides

are

reduced

n

stePs

o

FeO'

At

500

800K

lower

emperature

ange).the

following

eactions.take

lace:

3Fe203

CO

-+

2FqOa

+ CO2

FqOa

+

4CO

+3Fe

+

4CO't

Fe2(\

+ CO

-+

2FeO

+

CO2

At 900

-

1500K

highcr

emperature

ange)

..

i,/t

e"l$.'1--

rnaoufuctor.

of

sulphuric

acid

by

th e

Contact

Proccss.

-F1

[---l -- i -_i

Ans:

ir$

ll H H H ll-lt-J1 l-]

?'il?T

6

7

T-oley.

Ftow

ha(

$l2szq)

ll

SulPhur

umer

2l

Dust

reciPitator

3]

Washing

nd

ooling

ower

water

s

sPraYed)

4l

sl

ol

7)

8l

Drying

ower

(Conc'

i

2SOa

s sprayed)

Arsenic

pui i f ies

Contains

clat inous

hydrated

Fe201)

Preheater

Cataly'tic

onvert

contains

2O5)

Absorption

ower

packed

ith

quartzand

conc.

150a

is

sPraYcd)

The

conversion

f

SO2

o

SQ

by

eaction

with

oxygen

n

the

presence

fa

catalyst

(Vzo).

Thc

absorption

f

SOi

in

H2SOa

o

give

oleum

I/2S2O7).

The

manufachtre

fsulphuric

acid

by

he

contact

process

nvolves

he

ollowing

htee

teps:

il

The

bumingof

ulphur

r

sulphide

rcs

n

air

to generateO2.

iiil

The

SO2

produced

s

purifred

by

removing

dust

and

other

mpurities

such

as

arsenlc-

compounds.

The

key

step

s

the

catalytic

oxidation

of

SO2

with

02

to

give

SO3

n

the

presence

f

Z2O5

(oatalYst).

I'O

2,S(/2(.{)

O:rs

---]g

2SOl{s)

-_ t

LH

=

-196.6W

ntol

'

The

reaction

s

exothermic'

eversible

nd

the

forward

reaction

eads

o

a

decrease

in

uoturn.'

Therefore,

ow

temperature

nd

hioh

or.rrur.

ute

he

avourable

onditions

or

u

iuiitrt

vl.ld'

But

he

cmperatwe

hould

not

b.

u.ry

low

otherwise

he

ate

of

reaction

will

become

low'

m

Enil

ln

practice,

he

plant

s

operated

ta

pressue

r

@r

concentrated

2SOa

o

produce

leum.

'

,so,

+

{2soa

+ H2s2o7

'fhe

dilution

of

oleum

with water

ives

H2SOa

of

the

desired

oncentration.

Z3l

How

s

potassium

ichromatc

preparcd rom

purified

chromite

ore?

Ans:

Purified

chromite

ore is

fused with sodium

carbonate

n free

air.

The

reaction

occurs

as

follows:

4FeCrOa

8Na2CO3

702 -+

SNa2CrOa

2Fe2O3

+8C02

The

yellow

solutionof

sodium

chromate

s

filtered

and

acidified

with

sulphuric

o

givc

a

solut ion

from which

orange sodium

dichromatc

Na2Cr2O7

2H2O

can

be

crystallised.

Na2CrOa

2H+

-+

Na2A2O7

2Na+

+ H2O

Potassium

ichromate

s prepared y treating

a

solution

f sodium

ichromate

ith KCl.

Na2CryOy 2KCl -+ K2Cr2O7 2NaCl

Orange

rystals f

potassium

ichromatc

crystallise

ut.

241

Name

he

mctal

of thc X"l

'ow transition

.

scries

hat

il

does pt

displace

ydrogen rom

dilute

acids

Copper

iil forms

olourless

ons

n ts

+2

oxidation

state

271 al

Catculate

he

packing efficiency n

a

simple

cubic

crystal

attice.

In a

simplecubic

crystal

attice,

heatoms

are located

only at

the

comers.

Let

the

edge

engthof the unit

cell

be

a' and he

radius

ofthe

sphere e

r.

iiil

Can

exhibit

oxidation

state

Ans:

Manganese

251

Complete

hc

following

equations:

il 3clz

+

6NaOH

hot

and conc.)

+

iil XeF6

+3H2O

-+

iiil

.lO2

+Cl2-+

Ans: il 3Cl2

+ 6Na0H

-+

5NaCl+NaClO3+3H2O

iil XeF6

3H20

-+ XeO3

+ 6HF

iiil .SO2 CI2

-+

SO1C|2

261 Dcscribe

ach

ofthe

following:

il

Passivity,of

lurninium

,

ii] Brown

ring test

Ans:

] When

a

piece

f

aluminium

s

put rrto

conc.

HNO3, an

insoluble

nd

nactive

film

of the oxide

of

the metal

s fornrcd

over

the surface

of

the nretal

which

prevsnts urther

action by

conc.

HN()3

on the rnetal .This

is termed

as thc

passivity f aluminrum.

iil

The familiar

brouh

ring

test or

nitratcs

depends

n the

ability

of

Fe2*

to

reducc

nitrates

o

NO,

u'hich eacts

with

Fe2n

ta

forma brown

coloured

omplex.

he est

s

usually

arried

ut by

adding

ilute errous

sulphate

olution

o an

aqueous olution

containing

nihate on

and

hen carefully

adding

oncentrated

2SO

along

he i.les

ofthe

test

ube.

A brown

ing

s formed

at

the

unction

of the

wo iquids.

.. a

=2 r

A

urit

cellof a simple

cubic

rystal

attice

contains

sphere.

."

Packing

fficiency

al

el

With

thc

hclp

of

a:schgnatic

diagram''

lntcgrating

hisequation.

c

get

=

-

kt

+

L..

onstant

f

11,," ,,

l l '

rl rl l


33/41

\ r l s :

-

\ul"g99u.all'-' Eryi] q

Total

volunte

o1' thc

unt lccl l

cY l

=

-3--*,

100

52.4%

(2,

r

l

ut

)

ciu.

an

cxanrplc

f

mctal

dcficicncy

"t- ' t . 'd. f . . t .

ZtJ

el

l'tO

is

nrostll'

orrnd

vith

a

coniposition

o1' c6q50'

'

an'l sancxatnl-'lef a metal

ri i l r

rr, ' t r. i

:

c icncr'

efcct '

l

hc

nrolal

lcvati r 'rn

onstant

f

rvrt tr

*

0.S2"/kg.

f

a

solut ion

f

3'?5

g

of

a

non-r'olat i lc

olutc

n

50

g ofrvatcr

ha s

a

hoi l ing

point

of

100'95

C'

rvhat

wi l l

thc

nrolar

mrss

of

thc

solute

c?

Af',

=

/

- Io=

100

5

100

=

0

95

.,

_

100.0x

\ ' ,

> fz

AI,,

r

l4t

1000x0.52y3.75_arn/(

Ho

H,t)-

l

-l

-

-+\y'2

BenzaldehYde

bl

Complcte

he

ollowing

cquations:

\

ROII

+

SOCI2

+

lil RCHO + NH2OH -)

Ans:

\\

ROH

SOC|--'

R-Cl

+ SO2+

HC I

: : r R

NH.OH

r r l

' ' \a

=o

---)

l l / -

RO H

u)c(tur-totl

, , j

:6=ygl - l+H,O

Oxinte

riot)

'r

Ans:

De

cribe

Gabi iel is

Phthal imide

svnthcsis.

Gabriel 's

synthesis

s

used

for

th e

or.o.tu,i""

of

I

"

amints'

Phthalimide

n

ir.-"t""t wi th ethanol icKOH forms

;;;;i"'"

salt

of

Phthalimide

which

on

[."1"*

*frft

attcyt

raiae

followed

by

; i l ;ff i.

hYdroiYsis

roduces

he

corresPonding

rimary

mtne'

Phthalimide

il;Illl

q?

:;'"'*Gl,)''

uo

xb

[iY'-n-o

V\;,

0

N

-

AlkYl

Phthal i rnide

U

I

al

A.niline

annot

e

prepared

y

Gabriel

chem model papers

Documents