NEET Chemistry: Questions 537 - 543 of 677

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Question number: 537

» Chemical Kinetics » Differential and Integral Forms of Zero and First Order Reactions

MCQ▾

Question

Which of the following equation is true regarding zero order reaction?

Choices

Choice (4) Response

a.

dx/dt=k[A]0=k

b.

dx/dt=k[A]0=k

c.

dx/dt=k[A]1=k

d.

Either A or B

Question number: 538

» Chemical Kinetics » Differential and Integral Forms of Zero and First Order Reactions

MCQ▾

Question

The half-life of first order reaction having rate constant k = 1.7×10-5 sec-1 is?

Choices

Choice (4) Response

a.

1.8 hrs

b.

11.3 hrs

c.

9.7 hrs

d.

12.1 hrs

Question number: 539

» Chemical Kinetics » Differential and Integral Forms of Zero and First Order Reactions

MCQ▾

Question

The first order reaction has half life of 14.5 hrs. What percentage of the reactant will remain after 24 hrs?

Choices

Choice (4) Response

a.

45.5%

b.

68.2%

c.

18.3%

d.

31.8%

Question number: 540

» Chemical Kinetics » Rate Constant and Its Units

MCQ▾

Question

Rate constant of a reaction is 175 litre-1mol-2sec-1. What is the order of the reaction?

Choices

Choice (4) Response

a.

2

b.

0

c.

1

d.

3

Question number: 541

» Chemical Kinetics » Rate of a Chemical Reaction

MCQ▾

Question

The rate constant of the reaction 2N2O54NO2+O2 , is 3×10-5 sec-1. If the rate is 2.4×10-5 mol. lit-1sec-1. Then the concentration of N2O5 in mol lit-1 will be?

Choices

Choice (4) Response

a.

0.8

b.

1.2

c.

1.27

d.

2.1

Question number: 542

» Chemical Kinetics » Activation Energy

MCQ▾

Question

The activation energy of a reaction can be lowered by?

Choices

Choice (4) Response

a.

Decreasing temperature

b.

Using a positive catalyst

c.

Increasing reactants concentration

d.

Increasing temperature

Question number: 543

» Chemical Kinetics » Collision Theory of Bimolecular Gaseous Reactions

MCQ▾

Question

According to the collision theory?

Choices

Choice (4) Response

a.

All collisions are effective

b.

All collisions are responsible for product formation

c.

Only a fraction of collisions is effective which have enough energy to form products

d.

All collisions are sufficiently violent

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