2nd pu chemistry jan 2015.pdf
TRANSCRIPT
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8/20/2019 2nd PU Chemistry Jan 2015.pdf
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'l
RDPUCPA
District
level
Preparatory
Examination,
January
2015
il
P.U.C.
CHEMISTRY
I
Time
: 3%
Hours
tr
Max.
Marks
:70
General
Instructions
:
1)
The
question
paper
has
four
parts
A,
B,
c and
D.
All
questions
are
compulsory.
2)
Write
balanced chemical equations
and
labeled diagrams where required.
3)
Use
1og
tables
and
simple
calculator
it
necessary.
PART.A
I.
Answer
all
the
following
questions.
Each question
carries
one
mark
each.
1.
Give
an
example
for
solid-solid
solution
2.
What
is the
effect
of
increase
in temperature
on the
solubility
of
gas
in liquid?
4:
Mention
the unit
for
rate
of
reaction.
5.
State
Hardy-Schulze rule.
6.
Write
the
composition
of
copper
matte?
7.
How Xe
Pt
Fuis prepared?
8.
What
are freons?
i
9.
Complete
the
following
reaction.
i
'
CH,
CH,OH
Conc' HrSOo,
10.
Give
an
example
for acidic
amino
acid?
PART-B
II'
Answer
any
five
of the
following
questions.
Each question
carries
two
marks
each.
5
x
2:
l0
11. Acon
c,o,iffi
Htlf;,:mr'jl"Ti:iff
;H::'"?,rl::11ffi
;,iJt?r#ffixi,?1il_$$l*
L2.
Write
the
reactions
which
takes plpce
at cathode
and anode
in
a
dry
cell?
13.
Define
second
order
reaction.
Give
an
example
14.
Give
rea$on.
i)
Cerium
exhibits +4
oxidation
state
ii)Actinoid
contaction
is
more
then
lanthanoid
contraction
,:t-, 3113*
swart's
reaction
with
example.
16.
How
carboxylic
acids
are
prepared
from
nitriles?
-_)
l7'
Explain
saponification
with
example.
18.
What
areianalgesics.
Give
an
example
?
PART-C
rrr'
Answer
any
five
of the
following
questions. Each question
carries three
marks.
19'
With
reference
to
the
extraction
of aluminium
Uy
uatt-Heroult
process.
i)
Draw
labelled
diagram.
b)
Write
the
reaction
taking
place
at
cathode
andAnode.
20.
Explain
how
nitric
acid
is
manufactured
by
ostrvalds process?
21.
Complete
the
following
reactions.
electric
discharge
ii)
oxidation
of ferrous
sulphate
to
ferric
sulphate
by acidified
chlorine.
iii)
Laboratory
preparation
of
hydrogen chloride.
23.
Explain
how
potassium
dichromate
is
manufactured
from
chromite
ore.
24.
With
reference
to
first
row
transition
series.
1l
2Kclo,
Mno,,
ii)
H,S
+
cl,-+
iii)
30,
22.
Write
the
equation
for
i)
the
action
of
chlorine
with
excess
ammonia.
L0x1:10
5x3:15
P.T.O.
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8/20/2019 2nd PU Chemistry Jan 2015.pdf
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IV
,,7
..
i)
Write
general
electronic
configuration.
ii)
Formation
of
coloured
ions.
iii)
Se3.
is colourless
and
Mn,*
is pink
give
reason.
25'
Using
vBT
account
for
Geometry
and
magnetic
property
of
[co
(NHr)u],*
26.
i)
Write
cis
and
hans
isomers
of
[Coclr(en)J.
ii)
Give
an
example
for
didentate
ligand.
PARGD
Answer
any
three
of
the
following
questions.
Each question
carries
live
marks.
27
a)
calculate
the packing
efficiency
in
ccp
rauice.b)
Name
any
two
crystal
system.
28'
?lTht
boiling
point
of
water
becomes
100.52'c
when
l.5g
of
a
non
volatile
solute
100g
of
it.
Calculate
the
motar
mass
of
the
solute.
b)
What
are
azeotropes.
Give
an
example.
29.
a)
calculate
the
equilibrium
constant
of
the
reaction
at
29gK
Mg
(s) +
2Ag.(aq)
i+
Mg.'(aq)
+
2
Ag(s).
E.."r:
+
3.16V.
3
+
2
b)
write
the
symbolic
representation
of
standard
hydrogen
electrode
and
give
its
standard
electrode
potential.
30'
a)
Derive
an
integrated
rate
equation
for
the
velocity
constant
for
a
first
order
reaction.
:Iil3lJf,,lf"o
of
a
first
order
reaction
is
30min.
calculate
the
time
required
to
complet
e
B0o/o
31.
a)
Give
any three
differences
between
physisorption
and
chemisorption.
b)
What
is
i)
Tyndatl
effect
ii)
Dialysis.
3+2
v
Answer
any
four
of the
following
questior:}X'ruestion
corries
live
marks
each.
4
x
5:20
2.
a)
Explain
i)
wurtz
-
fitting
reaction
ii)
state
zaitsev
rure.
3.H;[l];rt"fations
forthe
steps
in
S*2
mechanism
of
conversion
of
methyt
chloride
into
33.
a)
Explain
rcimer-Tiemann
reactionwith
example.
b)
what
is
w,liamsons
ether
synthesis
writ"
its gerrerar
equation.
34.
L)
tvrite
equation
for
i)
The
reaction
between
carboxyric
acid
and
pcr,
ii)
The
formation
of
oxime
by
aldehydes
and
hydroxyl
amine.
iii)
clemenson
reduction.
b)
Explain
aldol
condensation
with
example.
35.
a)
Complete
the
following
reaction
5x3=15
3+2
dissolved
in
3+2
3+2
3+2
36.
i)
R-co-NH,
+
4
[H]
LiA1H4>
ii)
c6HsNH2
+
HNo2 +
H"t
o'r,
NH.
iii)O+3Brz Br,/HzO,
i
,
b)
Methyt
amine
is
skonger
base
than
Ammonia.
ci[rgalson.
a)
i)
what
is
denaturation
of protein
ii)
Give
an
example
for
water
soluble
vitamin.
iii)
How
do
you
confirm
glucose
cpntain
five
_OH
group.
b)
Write
the
haworth,s
structure
of
cr
_
D
(+)
glucose.
I
a)
Mention
the
monomers
and
partial
structure
of
terylene
b)
what
is
wlcanrisation
of
rubber.
c)
Give
an
example
for
biodegradable
polymer.
37.
*****x****{