NEET Chemistry: Questions 561 - 566 of 941

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Question number: 561

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

MCQ▾

Question

If a first order reaction takes 32 minutes for 75 % completion, then time required for 50 % completion is?

Choices

Choice (4) Response

a.

4 min

b.

8 min

c.

32 min

d.

16 min

Question number: 562

» Chemical Kinetics » Rate of a Chemical Reaction

MCQ▾

Question

The rate of a gaseous reaction is given by the expression k [A] 2 [B] 3. The volume of the reaction vessel is suddenly reduced to one half of the initial volume. The reaction rate relative to the original rate will be?

Choices

Choice (4) Response

a.

32

b.

24

c.

1/32

d.

1/24

Question number: 563

» Chemical Kinetics » Rate of a Chemical Reaction

MCQ▾

Question

For the reaction 2NO22NO+O2 , the rate is expressed as?

Choices

Choice (4) Response

a.

12d[NO2]dt=12d[NO]dt=d[O2]dt

b.

2d[NO2]dt=2d[NO]dt=d[O2]dt

c.

12d[NO2]dt=12d[NO]dt=d[O2]dt

d.

d[NO2]dt=d[NO]dt=d[O2]dt

Question number: 564

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

MCQ▾

Question

Idonation of acetone in presence of H+ is the reaction, which order?

Choices

Choice (4) Response

a.

Third order

b.

zero order

c.

Second order

d.

First order

Question number: 565

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

MCQ▾

Question

At 500 K, the half-life period of a gaseous reaction at an initial pressure of 80 kPa is 350sec. When the pressure is 40 kPa, the half-life period is 175 sec; the order of the reaction is?

Choices

Choice (4) Response

a.

3

b.

1

c.

2

d.

0

Question number: 566

» Chemical Kinetics » Rate of a Chemical Reaction

MCQ▾

Question

Ammonia and oxygen reacts at higher temperature as 4NH3(g)+5O2(g)4NO(g)+6H2O and in this experiment the concentration of NO increases by 1.08×10-2 mol lit-1 in 3 seconds, calculate rate of reaction?

Choices

Choice (4) Response

a.

9×10-3 mol. lit-1sec-1

b.

0.009 mol. lit-1sec-1

c.

9×10-4 mol. lit-1sec-1

d.

0.9×10-4 mol. lit-1sec-1

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