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

1/5

%

(i)

'

The

question

papu

tris

ro*r.,,pa1.i:

e/g,faro

$r,

61r,:626n1

(Use

of

scientifi

c

calculator,

s

isd,*la-ea)

PY-

*,,

compulsory.

(ril

"yrite

.bala.nced,

,cherRical

r,.:,

tions

and

draw

lab,efied.

diaryams

wherever

required.

(iii)

Use

log

tables

and

the

simpre

carcurators

ifnecessary.

(Answer

each

question

in

one

word

or in

one

sentence)

1.:

,

1ffi41:istsiaarySolution?

:

.'.

,',

.

Z.

DefineMolarity.

:

.,'::

Write

the

S.I.

uniti

of

molar

conductivily_

:

Give

an

example

of

zero-order

reaction-

. .t

,

$t[t161:r

Physieal

AdsorT{ian

..

..

.

Wrile

the'composition

of

,eopper

matte,

Write

the

structure

of

XeFo.

wn*atareFreons?

'

' :

"'

,:]

-

,

::

PART-,A

t

Answer

all

of

the

f,ollowing

:

'

9.

Give

the

IUPAC

name

of

CHTCHO.

:

10i

'N

thep"1$npresentinhair.

l

;$,$i{

-

l0x1-10

3.

5.

-|

&.tR;1

:

l

i

t'

li

I

l

li

Second PUC Chemistry July, 2014 Question Paper

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

2/5

II.

PART

-

B

(Each

question

carries

two

marks)

11.

calculate

the

nurnber

of

atoms present

in

FCC

crystar.

12.

What is

Conosion

? Name

one

method

to prevent

I 3.

Derive

an expression

for

half-rife

period

of first

order

reaction.

Give

reasons

:

(i)

Actinoids

show

variable

oxidation

state

(ii)

Zr

Tnd,Hlhave

almost

identical

radii

15.

Explain

Kolbe,s

reaction.

16.

How

are

Carboxylic

acids prepared

from

nitriles

?

17,

What

are

antiseptics'?

Give

example.

18.

What

are

food preservatives

?

Give

an

example.

:

PART

_

C

Answer

any

five

of

the

following

:

(Each

question

camies

three

marks)

5x2:10

5x3=15

I

14.

III.

l9'

Describe

the

three

steps

involved

in

the leaching

of

bauxite

to get

pure

alumina.

20.

How

is

ammonia

manufactured

by

Haber,s

process

?

21'

Describe

the preparation

ofiozonised

oxygen

with

an

equation.

Name

the

ozonised

produc1obtainedwherttheozoRe.reactswitlrte"a-s.lpr,ioe'

I

{

Code

No.34

(NS)

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

3/5

\/

22.

'CornBlete

the

following.gquations

:

(i)

2Al

+

3Ctr---->

(ii).H2S+Clr7--+

",

(iii)

8 NH3

+

3Ctr---->

(excess)

23.

How is

Potassium

dichromate

prepared

from

chromite

ore

?

il

lvVhy

do

transition

elements

forur:comrplex

compounds

?

Nmrethe,eleirtent

which

state

any

three postulates

of wemer

theoiyof

coofiination

compounds.

Using

VBT

account

for

geometry

and

maggetiiproperty

of

[M(CN]ol]

lV.

Answer

any

three of

the

following

:

27.

(al

calculate

the

p'acking

effielency.iu

a

siudg

Dubic,lattice.

(b)

What

is Frenkel

defect

?

Giveexarnple,

,

28. (a)

The vapour

pressure

of

pure

benzene

at

certain

temperature

is

0.850

bar.

39

grams

of

benzene

(molar

mass

78 grams),

vapour

pressure

of

the

solution,

(b)

What

happens

to the

solubility'of,

tl, gas

in

a liquia

with:increase

in

temperature

?

Give

reason.

29,:

.(a)

Describe

the construcJion

aad

wo{ktng,dfitandarg

hydrogen'electrode.

(b)StateFaraday'sSecondLawofElectrolysis..l.l-i4,'

":-.

. 1:

3

24.

,(

26.

PART

*

D

j

3x5=15

,

3

2

Code

No.34

G{S) 9

:

i

)

.

P.T.O.

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

4/5

30' (a)

The

rate

df

reaction

increases

by

2

tirnes

when

ttr"

ternj"rature

of flie

raised

from

300

K

to

310

K.

calculate

the

energy

of

activation.of

the.reaction.

(Given

R

:

8.3

14

J/K/mole)

(b)

write

any

two

differences

between

morecularity

and

order

of

a

31.

(a)

what

is

coagulation

of

a sor

?

Name

two

methods

by

which

a

can

be coagulated.

(b)

What

is

Homogeneous

Catalysis

?

Give

example.

V.

Answer

any

four

of

the

following

I

(Each

question

carries

5

marks)

32.

(a)

Mention

the

major product

formed

in

the

folrowing

reactions

:

Lyophobic

sol

4x5=20

3

(i)

CuHrBr

+

14*

dry

ether,

(ii)

2-bromopen,*"

alc

KOH,

A,

(iii)

CH3C/ +

NaI

(b)

write

the

equations

for

the

steps

in

S*l

mechanism

of

conversio,

of

tert-

butylbromide

into

tert-butyl

alcohol.

33.

(a)

What

is

the

effect

of

(i)

erectron

withdrawing

group

on

acidity

of

phenors.

(ii)

erectron

donating

group

on

acidity

of

arcohols

(iii)

boiling

poi,t

of

arcohols

on

increasing

number

of

carbon

atoms.

(b)

Give

equation

for

Williarnsons

ether

synthesis.

34.

(a)

Write

equation

for

(i)

the

reaction

between

Carboxylic

acid

and

pC/r.

(ii)

the

reaction

between

formaldehyde

and

conc

KoH.

(iii)

the

formation

of oxime

from

car-bonyl

compou'd.

(b)

Explain

aldol

condensation

with

an

example.

dry

acetone

Code

No.34

(NS)

10

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