Physical Chemistry (CSIR Chemical Sciences): Questions 5 - 8 of 117

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Question number: 5

» Physical Chemistry » Chemical Kinetics » Empirical Rate Laws and Temperature Dependence

Appeared in Year: 2014

MCQ▾

Question

Temperature dependence of a reaction is given by,

K=AT2exp(E0RT) .

Activation energy (Ea) of the reaction is (June)

Choices

Choice (4) Response

a.

E0

b.

E0+2RT

c.

2E0+RT

d.

E0+12RT

Question number: 6

» Physical Chemistry » Statistical Thermodynamics » Kinetic Theory of Gases

MCQ▾

Question

Absorption of gas is described by Langmuir isotherm with equilibrium constant k=0.9KP1 at 25 . Pressure (KPa) at which fractional surface coverage is 0.95 is,

Choices

Choice (4) Response

a.

11.1

b.

42.2

c.

111.1

d.

21.1

Question number: 7

» Physical Chemistry » Polymer Chemistry » Kinetics of Polymerization

Appeared in Year: 2012

MCQ▾

Question

A polymer sample has following composition:

Table showinh the Number of molecules and molecular weight

Number of molecules and molecular weight

No. of molecules

Molecular weight

10

1000

50

2000

40

4000

Polydispersity Index of polymer is: (December)

Choices

Choice (4) Response

a.

729850

b.

8581

c.

8500027

d.

850729

Question number: 8

» Physical Chemistry » Chemical Kinetics » Empirical Rate Laws and Temperature Dependence

Appeared in Year: 2013

MCQ▾

Question

Rate equation for reaction 2AB+B22AB2 is rate=k[AB][B2]. possible mechanism consistent with this rate is, (June)

Choices

Choice (4) Response

a.

2AB+B2slow2AB2

b.

AB+ABfastA2B2 ; A2B2+B2slow2AB2

c.

AB+B2slowAB3 ;AB3+ABfast2AB2

d.

AB+B2fastAB3 ;AB3+ABslow2AB2

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