NEET (National Eligibility cum Medical Entrance Test) Chemistry: Questions 535 - 540 of 1145

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Question number: 535

» Chemical Kinetics » Arrhenius Theory

MCQ▾

Question

In an Arrhenius equation for a certain reaction the value of A and Ea are 4×1013sec-1 and Equation . At what temperature, the reaction will have specific rate constant 1.1×10-3 sec-1?

Choices

Choice (4) Response

a.

328.24 K

b.

310.96 K

c.

340.3 K

d.

377.56 K

Question number: 536

» Chemical Kinetics » Rate of a Chemical Reaction

MCQ▾

Question

The decomposition of nitrogen pent oxide follows first order rate law. Calculate the rate constant from the given data?

t = 800 sec [N2O5] = 1.45 mol/L

t = 1600 sec [N2O5] = 0.88 mol/L

Choices

Choice (4) Response

a.

6.24×10-4 sec-1

b.

0.64×104 sec-1

c.

4.67×10-4 sec-1

d.

0.467×10-4 sec-1

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.

Equation

b.

Equation

c.

Equation

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

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