CSIR Chemical Sciences: Questions 25 - 28 of 329

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 329 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 250.00 or

Question number: 25

» 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: 26

» 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

Question number: 27

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

Appeared in Year: 2012

MCQ▾

Question

A bacterial colony grows most commonly by call division. The change in population due to cell division in an actively growing colony is dN=λgNdt. The population of bacterial colony at time t [N0 = N (t = 0) ] (December)

Choices

Choice (4) Response
a.

N0exp(λgt)

b.

N0(λgt)2

c.

N0λgt

d.

N0exp[λgt]

Question number: 28

» Physical Chemistry » Chemical Kinetics » Determination of Reaction Mechanisms

Appeared in Year: 2013

MCQ▾

Question

First order gaseous reaction is 25 % complete in 30 min at 227 and in 10 minutes at 237 . Activation energy of reaction is closest to (R = 2 cal k-1mol-1) (December)

Choices

Choice (4) Response
a.

110 k cal/mol

b.

55 k cal/mol

c.

5.5 k cal/mol

d.

27 k cal/mol

Sign In