2016 sample paper 12 chemistry 02

8/16/2019 2016 Sample Paper 12 Chemistry 02

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SAMPLE PAPER-02

CHEMISTRY (Theory)

(Question)

Class !II

Time allowed: 3 hours Maximum Marks: 70

"eneral Instru#tions$

a) All the questions are compulsory.

b) There are 2% questions in total.

c) uestions & to ' are !ery short answer type questions and carry one mark each.

d) uestions % to &0 carry to marks each.

e)

uestions && to 22 carry three marks each.

") uestions 2is !alue based question carryin# *our marks.

#)

uestions 2+to 2% carry *i,e marks each.h) There is no o!erall choice. $owe!er% an internal choice has been pro!ided in one question

o" two marks% one question o" three marks and all three questions in "i!e marks each. &ou

ha!e to attempt only one o" the choices in such questions.

i) 'se o" calculators is not permitted. $owe!er% you may use lo# tables i" necessary.

(. rite the structure o" (*chloro*+%+*dimethylpropane.

+.

hat is the e""ect o" presence o" ,chottky de"ects on the density o" the crystal-

3. " a compound is "ormed by the elements / and & crystallises in the cubic arran#ement with /

atoms at the corners o" a cube and & atoms at "ace centres% then #i!e its "ormula o" the

compound-

.

1i!e any two main "unctions o" hormone adrenaline.

2. e"ine co*en4yme.

5. 6xplain brown rin# test.

7. 6xplain:

i. 6lectrophoresis

ii. ialysis

. A compound is "ormed by two elements / and &. " the atoms o" the element & 8as anions)

make ccpand those o" the element / 8as cations) occupy all the octahedral !oids% then what is

the "ormula o" the compound-

r

An element has a body*centred cubic structure with a cell ed#e o" + pm. The density o"

the element is 7.+ #9cm3. $ow many atoms are present in +0 # o" the element-

. The initial concentration o" ;+


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(0. hat conclusions can be drawn "rom the equation: ( )0 0 01 2 1 2P p p p x= + − -((.

a) denti"y all the possible monochloro structural isomers expected to be "ormed on "ree

radical monochlorination o" 8@$3)+@$@$+@$3.

b)

urin# the reaction o" alcohols with ?% sulphuric acid is not used. 1i!e reason.

c) Alkyl halides thou#h polar% are immiscible with water. hy-

(+. $ow the presence o" sulphur dioxide is detected-

(3.

apour pressure o" chloro"orm 8@$@l3) and dichloromethane 8@$+@l+) at + ? are +00 mm

$# and (2 mm $# respecti!ely.

a) @alculate the !apour pressure o" the solution prepared by mixin# +2.2 # o" @$@l3 and 0 #

o" @$+@l+ at + ?.

b) The mole "ractions o" each component in !apour phase.

(. @omplete the "ollowin# reactions:

a)

$#@l+ = B$3

b) ;a@l


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+. 1i!e the name o" the rea#ents to brin# the "ollowin# con!ersions:

a. Allyl alcohol to propenal

b. Eut*+*ene to ethanol

c. @yclohexanol to cyclohexanone

d.

6thanenitrile to ethanol

e. $exan*(*ol to hexanal

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@omplete the reactions:

a.

b.

c.

+2.

a) 1i!e the important ad!anta#es o" "uel cells o!er ordinary batteries.

b) e"ine molar conducti!ity and equi!alent conducti!ity.


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b)

" the limitin# molar conducti!ities "or ;acl% $@l and ;aAc are (+5.% +2. and (.0 ,

cm+9mol respecti!ely% then calculate J0 "or $Ac.

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a) The conducti!ity o" 0.00(0+ mol9> acetic acid is .2 x (0*2 ,9cm. calculate its

dissociation constant i" the limitin# molar conducti!ity "or acetic acid is 30.2 , cm+9mol.

b) 1i!e a short not on nickel K cadmium cell. 1i!e its o!erall reaction durin# dischar#e.

2016 sample paper 12 chemistry 02

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