Physical Chemistry (CSIR Chemical Sciences): Questions 13 - 16 of 117

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Question number: 13

» Physical Chemistry » Chemical Kinetics » Photochemical Reactions

Appeared in Year: 2015

MCQ▾

Question

In a photochemical reaction, radical are formed according to the equation.

C4H10+hυk1k12C2H5

C2H5+C2H5k2C2H6+C2H4

IfIisintensity of light absorbed, rate of overall reaction is proportional to (June)

Choices

Choice (4) Response

a.

I

b.

I12[C4H10]

c.

I12

d.

I[C4H10 ]

Question number: 14

» Physical Chemistry » Colloids and Surfaces » Isotherms and Surface Area

Appeared in Year: 2014

MCQ▾

Question

For non-dissociative Langmuir type adsorption of a gas on a solid surface at a particular temperature, fraction of surface coverage is 0.6 at 30 bar. Langmuir isotherm constant (in bar1units ) at this temperature is (June)

Choices

Choice (4) Response

a.

0.02

b.

2.0

c.

5.0

d.

0.05

Question number: 15

» Physical Chemistry » Chemical Kinetics » Determination of Reaction Mechanisms

MCQ▾

Question

Concentration of a reactant decreases linearly with time. What is order of reaction? (CSRD MHRD Sample Paper Question)

Concentration of a reactant decreases linearly with time

Concentration of a Reactant Decreases Linearly With Time

Graph showing concentration of a reactant decreases linearly with time

Choices

Choice (4) Response

a.

1

b.

0

c.

2

d.

Fraction

Question number: 16

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

Appeared in Year: 2013

MCQ▾

Question

Rate constant of a unimolecular reaction was 2.66×103 and 2.2×101s1 at T = 120 k and T = 360 k. Rate constant (in s-1) at 240k would be (December)

Choices

Choice (4) Response

a.

2.4 × 10 - 1

b.

1.8 × 10 - 3

c.

4.8×102

d.

2.4×102

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