Explore topic-wise MCQs in Chemistry Questions and Answers.

This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.

1.

The rate law for the reaction involved in inversion of cane sugar is R=k [C12H22O11] [H2O].

A. True
B. False
Answer» C.
Discussion
2.

What is the rate law for the reaction C2H4 + I2 → C2H4I2?

A. R= [C2H4] [I2]3/2
B. R= [C2H4] [I2]3
C. R= [C2H4] [I2]2
D. R= [C2H4] [I2]
Answer» B. R= [C2H4] [I2]3
Discussion
3.

How many times will the rate of the elementary reaction 3X + Y → X2Y change if the concentration of the substance X is doubled and that of Y is halved?

A. r2= 4.5r1
B. r2= 5r1
C. r2= 2r1
D. r2= 4r1
Answer» E.
Discussion
4.

What is the concentration of the reactant in a first order reaction when the rate of the reaction is 0.6 s-1 and the rate constant is 0.035?

A. 26.667 M
B. 17.143 M
C. 26.183 M
D. 17.667 M
Answer» C. 26.183 M
Discussion
5.

What is the rate law for acid hydrolysis of an ester such as CH3COOC2H5 in aqueous solution?

A. k [CH3COOC2H5]
B. k [CH3COOC2H5] [H2O]
C. k [CH3COOC2H5]2
D. k
Answer» B. k [CH3COOC2H5] [H2O]
Discussion
6.

For the reaction A + H2O → products, find the rate of the reaction when [A] = 0.75 M, k= 0.02.

A. 0.077 s-1
B. 0.085 s-1
C. 0.015 s-1
D. 0.026 s-1
Answer» D. 0.026 s-1
Discussion
7.

For a reaction A +B → C, the experimental rate law is found to be R=k[A]1[B]1/2. Find the rate of the reaction when [A] = 0.5 M, [B] = 0.1 M and k=0.03.

A. 4.74 × 10-2 (L/mol)1/2 s-1
B. 5.38 × 10-2 (L/mol)1/2 s-1
C. 5.748 × 10-2 (L/mol)1/2 s-1
D. 4.86 × 10-2 (L/mol)1/2 s-1
Answer» B. 5.38 × 10-2 (L/mol)1/2 s-1
Discussion
8.

The rate constant of a reaction is k=3.28 × 10-4 s-1. Find the order of the reaction.

A. Zero order
B. First order
C. Second order
D. Third order
Answer» C. Second order
Discussion