Physical Chemistry-Chemical Kinetics (CSIR Chemical Sciences): Questions 18 - 22 of 41

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Question number: 18

» Physical Chemistry » Chemical Kinetics » Collision and Transition State Theories of Rate Constants

Appeared in Year: 2013

MCQ▾

Question

Equilibrium population ration ( nj/ni ) of a doubly degenerate energy level ( Ej ) lying 2 unit higher than a lower non-degenerate energy level ( Ei ), will be [(kBt)=1]

(June)

Choices

Choice (4) Response
a.

e2

b.

2e2

c.

2e2

d.

e2

Question number: 19

» Physical Chemistry » Chemical Kinetics » Collision and Transition State Theories of Rate Constants

Appeared in Year: 2012

MCQ▾

Question

Arhenius parameter for thermal decomposition of NOCl, 2NOCl (g) → 2NO (g) + Cl2 (g)

Ea = 105 kJ/mol

RT = 2.5 kJ/mol Enthalpy (kJ/mol) of activated complex will be (December)

Choices

Choice (4) Response
a.

110

b.

102.5

c.

105

d.

100

Question number: 20

» Physical Chemistry » Chemical Kinetics » Steady State Approximation

Appeared in Year: 2013

MCQ▾

Question

Overall rate law of following complex reaction.

2Ak1A2 (Fast equilibrium)

A+Bk2C (Fast equilibrium)

A2+Ck3P+2A (Slow)

By SSA, would be

Choices

Choice (4) Response
a.

k1,k2,k3[A]3[B]

b.

k1,k2,k3[A][B]

c.

k1,k2,k3[A][B]2

d.

k1,k2,k3[A][B]3

Question number: 21

» Physical Chemistry » Chemical Kinetics » Complex Reactions

Appeared in Year: 2013

MCQ▾

Question

Concentration of a reactant undergoing decomposition was 0.1, 0.08 & 0.067 mol L -1 after 1.0, 2.0 and 3.0 hr respectively. Order of reaction is (December)

Choices

Choice (4) Response
a.

1

b.

3

c.

0

d.

2

Question number: 22

» Physical Chemistry » Chemical Kinetics » Enzyme Kinetics

Appeared in Year: 2014

MCQ▾

Question

In Lineweaver Burk plot of (initial rate) -1 vs (initialsubstrateconcentration)1 for an enzyme catalyzed reaction following Michaelis Menten mechanism, the Y-intercept is 5000 M-1 s, If initial enzyme concentration is 1×109 M, the turnover number is________ (June)

Choices

Choice (4) Response
a.

1.0×104

b.

2.5×103

c.

2.5×104

d.

2.0×105

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