Engineering Chemistry July 2014

8/9/2019 Engineering Chemistry July 2014

1/3

USN

t0clJiE,tzl22

ly

2014

,9..

Time: 3

hrs.

Max. Marks:lQQr,,

i

f,

}Vot"r

l.

Answer

any

FIVE

full

questions, choosing at

least two

from

each

part.

r",,

'.'

€'

2. Answer

all

objective

type

questions

only

on OMR sheetpage

5 of the answer

btakiet.

[

-"'.

3.

Answer

to

obieaive

type

q^uestions

on iheets other

than OMR

will not

be

val*ii*''"'

f;

,,

BKH

t

I a.

ii:ehror"

the

correct

answers

for the fbtt"*.g ,

-'.

(04

Marks)

=

i)

'Calomel

electrode is reversible

with respect to,

B

4)

Cl-

ion

B)

Ag+

ion

C) Hg].

ion

D) None of

these

i

?

ii) A

galvanic

cell converts:

|'

i

1]

jlE

al energy

in

to chemical energy

.

in;,

''

+

B) Chemidaf_.energy in to electrical energy

Bt

C) ElectriCal energy

in

to

heat energy

="""

1t"'i

F

ili)

The Eovalue

of

thi

iJtl

z"tzi.llu.'.

lFe

is

if

Ei**

=-0.44and

Ei^,.

=

-0.76

.e

A)

+0.32

V

ts)"+L2 V

,

.:,C)

-0.32V

D)

-1.2V

  _',

-'.-

-

+

iv) Example

of an ion selective e.lectrode is,

€

-:'.:.'-.-- -.---

E

C)

Platinum

electrode

_t','=',,,

D)

Glass electrode

E

b.

What is single

electrode

potentiAl.?'Ob.fu

an

expression

for the

same.

(05

Marks)

E

c.

What

are reference electrodesflE ain the censtruction and

working

of

Calomel

electrode.

€

.'-

(osMarks)

O.

An electrochemical

cell is constn cted by immeryng a silver wire in AgNO3 solution of

;

0.5 M and

a Cadmium;wire

in

CdSO+ solution oT,0.25,,.,M at}5oC. Write the cell diagram,

$

::l;1"::1":il;l?:;::i$i?;Jell

and

change:inrree'enersv

Given

'

"-,;J:.:3

3

E

2 a. Choose the

correct answers

for the

following

:

..

(04

Marks)

tr . l-,

g i)

f@@sity

of

HzSO+to be maintained in the lead-acid

storag€.

$

is,

ts

, ,,,.&)"0.5

B)

1.2 C)2.4

i'*'

,D)None

of these

.S .iili'',\

Ih

which

battery,

a key

component

is separated from

rest of

the battery

prior

to

E

activation.

B ,r \ D-:*^., D\ o^^^-r^..,

ra\

T)^^^-,^

A)

Primay B) Secondary

C)

Reserve D) None of

these

x

5'

iii)

The

reaction

taking

place

at anode

of

a battery

.j

A)

Reduction

B)

Addition

C)

Neuhalization

D)

Oxidation

iv)

The electrolyte

used

in

Hz

-

Oz fuel cell is.

First/Second

Semester

B.E.

Degree Exami

Engineering

Ghemi

A) KOH B) Nacl

c)

NH4OH

Explain the

fo llowing b attery

charac teri stics :

i) Voltage

ii) Energy

storage

density iii) Cycle life

Explain

the

construction

and

working

ofNi

-

Cd battery.

D)

Kcl

b.

c.

d.

(06

Marks)

(06

Marks)

Explain

the

construction

and

working of

Hz

-

Oz

fuel

cell

and

mention its

applicatrons.

(04

Marks)

I of3

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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/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/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/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/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/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/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/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/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/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/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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8/9/2019 Engineering Chemistry July 2014

2/3

IOClf'lETzD2

.

3 a.

Choose the correct

answers

for the

following :

(04

Marks)

i) Development of

non

porous

and

uniform oxide

film

over a metal

surface due

to

colToslon,

A)

Decreases

the corrosion

rate

C)

Does not

have any effect

;",

.,

ii) Galvanizing

is the

process

of coating

of iron,

,-1,.r*,,,

._

A)

With Au

B) With

Zn

C)

With Cu

D) None of

the.pe

,";.,,,,|,*.,

iii)

Which

of the

following

is

an

example

of cathodic coating,

'

,,

';

,.

A) Galvanizing

B) tinning

C)

painting

D) Nonenflhbse

""'"

..""...

iv) Evolution ofhydrogen

type of corrosion

occurs

in,

t*I,* ,

''=''.,'.'.,'."..'*,,.,,,,

A) Acedic

medium

B) Basic

medium C)

Both a and b

D) Hlotle'of

these

b.

at is metalic

corrosion?

Explain

the electro chemical theory

of corrosiqih,,

=

(05

Marks)

c.

Oiscuss the

effect of the

following

factors on corrosion

rate:

iii)

POhrization

(06

Marks)

i'

.,,,.,

t

(05

Marks)

4a.

J,"#

Choose the

condffiswers

for the following :

i)

Technological..inmortance

of metal

finisl

""i

_:

-

i)

Technological importance of metal

finishing

ig

tp

inpart,

A)

Corrosion

residlcippe

B|

&lderability) Corrosion

residtaape

C) Thermal resistan&

#*,jn'

lf$art,

(04

Marks)

C) Thermal

res

D) All

of

these

\.,..

4I

nlr vr lllw'

fr

d€position is to,

D

Use

of complexing agbnt'during

electrodi deposition i

A) Obtain shining

deposit

.'

.

:

B) To check the metal ion concentration

D

Natirte oxide

film

ii)

Anodic to cathodic

area

d.

Explain

tliblbllowing

corrosion control

methods:

i)

Use

of iirlifu,itor

ii)

Galvanisation

C)

lncrease current

density

"'......,".',

.

.

The

proess

used

to

manufacture'P€;ts is,

A) Electoplating

iv)

Electrolessplating

A) Catalytically

active

C)

Any

surface

".'t.t,

A)

Iso Octane

C) n

-

heptane

iii) Photovoltaic cell

is

a,

A)

Storage cell

C) Fuel cell

iv)

Knocking

is

due

to,

A) Slow combustion

B)

lncreases the

corrosion

rate

D)

None of

these

D) None of these

lating

C) Phosphating

D) None

of

these

(04

Marks)

B)

c-Methyl

naphthalene

D) Cyclohexane

B) Rechargeable

cell

D) Energy conversion device

B) lncomplete combustion

b.

c.

d.

oelg on,

t''-;;{ff)

Inactive

surface

,.

tr)

Only on

plastic

sur ce

What is metal finishin6'?-M'ention any

3 technologitali,.ry.,portance

ofmetal

finishing.

',:,,

",.--

nj:r"':

(04

Marks)

Explain the factorS'that

influence

the nature

of elechodepq$l;

i)

pH

of electolylie

bath;

ii) temperature iii) cunent density

(06

Marks)

What is

elgetrdt€ss

plating? Explain

the

process

of electroless

platlng

of copper.

(06

Marks)

.l-'o'."0

PART

-

B

a. Clw#gttre correct

answers

for the

following

'

..,.,

litq'}

Methyl tertiary

butyl ether is

added to

gasoline

to,

iu

.;ll,}

."{,,..q

A)

T; increase the cetane

number B)

Minimize

the

knockin[';r-

,.-il

C)

To

increase the

efficiency

of diesel D)

Att

of

these

::

ii) Which of the

following

posses

zero

octane

number,

,

"'i.

C) Instantaneous

explosive

combustion D)

All

of

these

b.

What

is

calorific

value

of a fuel? Explain the bomb

calorimeter method

to

determine

calorific

value of a solid

fuel.

(06

Marks)

2

of3

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8/9/2019 Engineering Chemistry July 2014

3/3

t0cH.Bl2l22

5 c.

Calculate

the

gross

and net calorific value of

a coal sample

from the following data:

i) Weight of

coal

-

0.73

g

ii) Weight

of

water taken in

caloffi,

equivalent

of calori meter

:

470

g

iv)

Rise in

temperafll{e]}C

hydrogen in coal

sample 2.5% vl) Latent heat

of steam is

S@,/atg-r

d.

Explain

the methods of doping of silicon to

get

solar

grade

si

a.

Choose the

correct answers for the following

:

D

Gibbs

phase

rule for

general

system:

A)P+I:C-2

B)P+F:C-

I

i,.,, ii) Which of the following is

a one

component

system,

ii)

Neoperene.

B) Lead

-

Silver system

;n,

,.

:::

D) None of these

d

(04

Marks)

+F

*,"'

A)

Water

system

-

:

i

C) Iron

-

Carbon system

A)

Li

B) Cu

C) Fe

i)

Polyp-ethyl

methacrylate.

a.

Chomgthe

correct answers for the following

:

.,i)t"jf

Akalinity in water is

not due to,

..":{,,

'

A)

H-

B) OH

-

C)

COi

-''

i,

."

ii) The

tihant used in

estimation of total

hardness

of water is,

A) EDTA

iiD

Absorbance of light by a solution

of

a substance depends on,

,,,,

A)

Path length

B) Concentration ofSolUtion

e),,Wavelength of incident

light

D)

All

of

these

..,,,,,

i,;r"'

iv)

Flahre

photometry

is suitable for the detection

of

D) Zn

b.

State

phase

ruk.,piscuss the

application of

phase

rule to

water

ryri.-.

c.

Explain the prinoiple

and application

of

potentio

metric iitration with

titration.

I

d. Discuss the

conductci@$c titration and

mention tffi;ffivantages.

7 a.

Choose the

correct *r*e*,fo, the following

tr.,.,,,,,,,,

,,,

i)

Which of

the following is

aco

polymer?

A)

Pollhene

B)

Nituik

rubbq5.,

C) PVC

ii)

Requirement for

conductivity

in

pqlymer

is,

(05

Marks)

respect

to

redox

(06

Marks)

(05

Marks)

(04

Marks)

D) Plexi

glass

A) Linear

structure

"

l-'

,,,

B) Presence

of oxidising

or reducing

agents

C) Conjugation

,,,,,,'Iiii,,,,,-

D) All

of

these

iii) Natural rubber

is

polymerized

form of,

A)

Chloroperene

B)

Isoperene

C) Propene D) None of

these

iv) Benzoyl peroxide

is used

as,

A)

Initiator

B)

Terminator

C)

P,,rupogator

D) None of

these

b. What

is

polymerization?

Explain the addition polymerization's

mechanism by taking poly

ethylene

as

example. (05

Marks)

c.

Explain

the meehanism

of conduction

in

poly

acetylene.

(05

Marks)

d. Explain

the manufacture

of following

polymers

and mention

the uses:

,,i

',

.

(06

Marks)

,

,*,,r,*

(04

Marks)

,;

.

.1,.,f.

,

D)

KOH

) E.B.T

C)

NaCl

iii)

The

reagent

used in the

estimation of sulphate

ion in water is,

A)

Phenoldisufonic

acid

C) Alumonia

ir)

Temporary

hardness

ofwater is due to,

A)

Ca(HCO:)z B)

CaClz

b.

What is desalination

ofwater? Explain elechodialysis

method.

(05

Marks)

c.

Explain

the

experimental method

of determination

oftotal hardness

ofwater.

(06

Marks)

d.

50

ml of

sample of water

consumed

l5

ml

of 0.01 MEDTA,

before

boiling

and 5

ml

of the

same EDTA,

after

boiling. Calculate the total

hardness,

permanent

hardness and

temporary

hardness.

(05

Marks)

:k***:f

3 of3

B)

SPANDS

D)

Barium

Chloride

C)

CaSO+

D)

MgSOa

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