8/20/2019 2nd PU Chemistry March 2014.pdf

1/7

l'.',',r

1r

'I

I

I

-

.:

',,Instnrc.hons

.'.

,i}

The

question

paper

cornpulsory.

Ao

-3-

/q

faur'

Parts,

All

parts

are

'j

SubSect

Code :

34

{NS)

1Ox1=1O

P,,

qse;$

aJ

ts

l\c

ELf

1(

Englteh

Verslan

)

2ot

)@

3

2

t.

Part A

carries

l0

marks.

Each question

carrles

one mark.

Part.B

carries

l0

mafks.

Eaeh

qugstton

carrtes

troo

marks.

Pa-rt

C carries

15

marks. Each quesflopr

carries

three

marks.

Feirt

D

carries 35

marks.

Each question

carries..ftue

I

marKs.

'l

I

l

l

L

j

1

,I

3

iil) Write

balanced chemical

equations

and

draw diagrams

wherever

necessary.

,6

l

tv)

Use

log tables

and the simple

calculator

if

necessary.

:i

-

,,

t

Llse of scientiftc

catrculators'is.

not

atlowed

)'

'

il

2

I.

.Answer

all the

questions.

Each

question

e

es

one

mark.

(

Arrswer each

question

in

one

word

or in

one sentence

)

.

2..

Mention

'the

enthalpy

of mixing

(

A

mrx

H

)

vdlue

to

form

an

solution.

Wtrat.

is

a secondary

cell

?

For

the reaction

ZHI--+

H

z

4.'l

r,

Write,itq

molecularity.

3

4,

Itt

lnlitll$*l{u,ilffiilfl

ffi ffi

t}ffi

ffi

tlfi

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8/20/2019 2nd PU Chemistry March 2014.pdf

2/7

Subject

Code :

34

(NS)

t'

5.

Write

the

catalyst

used

in

the decomposition

of

potassium

chlorate

to

get

potassium

chloride

and

oxygen.

Name

the refining

method

used

to

produce

semiconductors-

Give a,reason

for

chemical

inertness

of

Noble

gases.

H

aC

-

Br

+

AgF

+

H

rC

-

F

+

AgBr.

Name

the

reaction,

Mention

the hybridised

state of

caqbonyl

carbon

atom.

which

is the

nitrogenous

base

present

only

in

RNA.

but

not in

DNA

?

PART

-

B

IL

Answer

anylftue

of

the following.

Each question

carries

tu.ro

marks.

Sx2=lO

Aluminium

c,rystallises

in

an..i[cc

structure:

Atomic

radius

of

the

metal

is

125

pm.

calculate

the

edge

length

of

unit

cell

of

the

metal.

what

is

molar

conductivity

?

How

is

it'related

to the conductMty

of

q

solution

whose

concentration

is

C mol

m

-

3

?

13.

Define

collision

frequency.

Give

an

example

for Pseudo-first

order

reacUon.

14.

what

is I.anthanoid

contraction

?

Mention

one of

its

consequences.

15.

Complete

the following

reactions

:

i)

R-CH2-oH

a-Z?n-'

.::.....

6.

7.

8.

9.

:

10.

I

t.

t2.

teireqqul

1r

ill

ililrilIililil ilI

Iffi

ilfl

ililtffillililll]t lilIilil

Pag'e

lO

qf

l5

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8/20/2019 2nd PU Chemistry March 2014.pdf

3/7

Subject

Code :

Ba

NS)

ExpfAin

Rosenmund's

reduction

of

'benzoyl

chloride.

What

are food preservatives

? Give

an

example.

:

Mention

a

drug

which

can act,

both,

as an

analgesic

as

well

as

an

antipyretic.

Narne

an

artificial

sweetening

agent.

PART

-

C

III. Answer

any

fiue

of

the following.

Each question

carrie

s ttvee

marks.

bx3=

16.

L7.

r8.

l5

the

9.

Draw

labelled

diagram

of Hall-Heroult

El€ctrolytic

cell

for

extraction

of

aluminium.

write

anode

and

cathode

reactions.

20-

For

the

manufacture

of

Ammonia

by

Haber's

process.

write

equation

and optimum

conditions

for

malcmum yield

of

ammonia.

2L.

Write

the

equations for

i)

the action

of

so

2

with

chlorine

in

the

presence

of charcoal

ii)

the action

of

SO

g

with

concentrated

sulphuric

acid

rii)

the action

of

ozone-

with

lead

sulphide.

22.

Complete

the following

equations

:

(

cold and

dilyte

)

2FeSO4+HzSO++Clr-+

the

u,

ru,

ilt Iilil

Iililil[l

ilflililfl ilfl lllililfl

ffit ililItil

t9"igs--_qLl

Page

ll

oJ15

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8/20/2019 2nd PU Chemistry March 2014.pdf

4/7

Subject

Code :

34

(NS)

23.

Explain

the manufacture

of

potassium

dichromate

from

24.

With

reference

to the

first

row

transition

series

:

chr:omite

ore

ii)

uI.,

name

the

metal

which

possesses

maximum

number

of oxidation

states.

I

among

Zn+

2

and

Cu

+

2

which

is

colourless

?

between

Tl2

+

and V2

+,

which

ion

contains

25.

more

number

of

for

tLre

geometry

and

magnetic

sing

Valence

Bond

theory,

account

property

of

[

rui

(

CN

1

nl,

-.

(

Given

:

Atomic

number

of Ni

=

28 )

-vt

)

26,

Give

the

IUPAC

name

or:[ti(*ro)p

lt*

Draw cis

and trans

.

isomers

of

I

o,

(

Nns

)

zctz]

DART

-

D

 

r ____

IV.

Arrswer

any three

of

the following.

Each

question

carries../ftue

marks.

.

:

.

gxb=

Calculate

the packihg

efficiencyrin

simple

cubic lattice,

What

is l'renkel

defect

? Give

ayr

example.

.

27.

a

b)

\.

l5

,3

2

[ltfltffi

flili[fffiffi ilfiruffi

ffi u ll

]t

Page:'L2

o;t, 5

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8/20/2019 2nd PU Chemistry March 2014.pdf

5/7

2r8.

a)

:

Subiect pode

:

34

(NS)

on

dissolving

2.34

g

,of

solute

in

4o

g

of

,benzene,

the

boiling

point

of'solution

was

higher

than

that

of benzene

by

o.gl

K,

Ku

value

for

benzene

is'2.53

K

kg

mol

-

I.

calculate

the molar

mass

of

the

solute.

State

Henry's

law.

Write

its

mathematical

form.

z

Draw

labelled

diagram

of

Standard

Hydrogen

Electrode

(

SHE

).

Write

its

half cell reaction

and

Eo

value.

3

Calculate

ArGO

for the

following

reaction

:

o"l;)

*

Aslont

-

o"ijn,

*

A€("ri.,

(

Given

:

.E3ru

=

+

0.03

V,-'F

=

96'500,

C

).

il

,,i

b)

29.

a)

.l

30.

a)

3I.

a)

rill[lillll{ffiil1lilll t

b)

The

rate of

a

particular

reaction

doublgs

when

the

temperature

changes

from

3oo K

to.

Blo

I(.

calculate the

energy

of activation

of

the reaction.

I

Given

:

R

=

8.314

JK-

I

mol-1

].

b)

show

that

the

half-life per'iod

of

a first

order

reaction

independent

of

initial

concentration

of reacting

rspecies.

is

2

b)

Give

any

three

differ.ences

chemisorption.

i)

-

Mentlon

the

role

-bf

alum

watei.

Give

an

example

for

oil

between

physisorption

and

3

in

the,purification

of

drinking

dispersed

in

water

emulsion.

z

,

lllilillililililffiiltIItil Page

13

oJ

l5

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ediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/

8/20/2019 2nd PU Chemistry March 2014.pdf

6/7

Subject.Code,:

34

{NS)

V.

{qpwer

an}r

jbur,of

the following,

Each.quesqo*,carriSs-fiue

marks.

,:

4x5=2iO

32.

a) i)

write

the equations

for

the

steps

rn

s

Nl

mechanism

of the

conversion

of tert.but}rl.bromide

into

tert.butyl

alcohol.

ii)

Haloarenes

are

l""q

reactwe.,

toward-s

:

nucleophtlic

substituuon

reactions

than

Haloalkanes.

Give

a

reason.

S

ii)

rClt" *r."@

E4plain

Willtamson's

ether

sylrthesls,

i)

Hsw

do

you

convert

benzoic

."idll

2

33,

a)

b)

34.

a)

1

ri)

Explain

the preparation

of

'phenol,

f,rom.

Cumer

r-e.

t

,.....,

OH

o+zn4

3

()

a

to henzamide

?

Writerthe

ii)

reaction.

Complete

the reaction

:

Anhydrous

AICI3I

HCI

3

b)

what

happens

when

carbonyl

compounds

are

treated

with

t4

lHtil+{fr{

tffiffiffillm

Page'

oJ I5

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8/20/2019 2nd PU Chemistry March 2014.pdf

7/7

;,,w:

he'

,,,

Hs,.c:,,y,

.

:.

':.:..,,

, ,,,

::,.H:

CH

oNH

z

ald

C

oH

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