Explore topic-wise MCQs in Chemistry.

This section includes 19 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.

1.

Glucose or fructose is converted into C2H5OH in the presence of

A. invertase
B. diastase
C. maltase
D. zymase
Answer» E.
Discussion
2.

In the Haber's process of synthesis of NH3

A. Mo acts as a catalyst and Fe as a promotor
B. Fe acts as a catalyst and Mo as a promotor
C. Fe acts as inhibitor and Mo as a catalyst
D. Fe acts as promotor and Mo as auto catalyst
Answer» C. Fe acts as inhibitor and Mo as a catalyst
Discussion
3.

Assertion (A) : A chemical reaction becomes faster at higher temperature.Reason (R) : At higher temperature, molecular motion becomes more repidCodes

A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is not the correct explanation of A
C. A is true but R is false
D. A is false but R is true
Answer» B. Both A and R are true but R is not the correct explanation of A
Discussion
4.

In the Ostwald's process for manufacture of HNO3 the catalyst used is

A. Fe
B. Pt
C. V
D. O
E. Mo
Answer» C. V
Discussion
5.

Alcoholic fermentation is brought about the action of

A. Yeast
B. CO
C. O
D. CO
Answer» B. CO
Discussion
6.

The catalyst used in the Deacon's process for the manufacture of chlorine is

A. Pt
B. CuCI
C. V
D. O
E. Fe
Answer» C. V
Discussion
7.

Glucose or fructose is converted into C

A. invertase
B. diastase
C. maltase
D. zymase
Answer» E.
Discussion
8.

In the Haber's process of synthesis of NH

A. Mo acts as a catalyst and Fe as a promotor
B. Fe acts as a catalyst and Mo as a promotor
C. Fe acts as inhibitor and Mo as a catalyst
D. Fe acts as promotor and Mo as auto catalyst
Answer» C. Fe acts as inhibitor and Mo as a catalyst
Discussion
9.

Enzyme catalysis is an example of

A. auto catalysts
B. heterogeneous catalysts
C. homogeneous catalysts
D. induced catalysts
Answer» C. homogeneous catalysts
Discussion
10.

Efficiency of the catalysts depends on its

A. molecular state
B. number of free valencies
C. physical state
D. amount used
Answer» B. number of free valencies
Discussion
11.

Which of the following types of materials act as effective catalysis ?

A. Alkali metals
B. Transition metals
C. Alkaline earth metals
D. Radioactive metals
Answer» C. Alkaline earth metals
Discussion
12.

The hydrolysis of cane sugar is catalysed by

A. H
B. <sup>+</sup>
C. Mineral acid
D. Enzymes
E. All of these
Answer» E. All of these
Discussion
13.

Which of the following is not a reducing sugar ?

A. Sucrose
B. Glucose
C. Fructose
D. None of these
Answer» B. Glucose
Discussion
14.

Substance which alter the velocity of reaction themselves remaining chemically and quantitatively unchanged after reaction are known as

A. Indicators
B. Catalysts
C. Adsorbates
D. Surfactants
Answer» C. Adsorbates
Discussion
15.

The substance which decreases the rate of a chemical reaction is called

A. Inhibitor
B. Poison
C. Moderator
D. Promotor
Answer» C. Moderator
Discussion
16.

TEL minimise the knocking effect when mixed with petrol, it acts as

A. Positive catalyst
B. Negative catalyst
C. Auto catalyst
D. Induced catalyst
Answer» C. Auto catalyst
Discussion
17.

Which of the following catalyst is sensitive to temperature changes ?

A. Fe
B. Pt
C. Ni
D. Enzyme
Answer» E.
Discussion
18.

The temperature at which the catalytic activity of the catayist is maximum, is called ?

A. Critical temperature
B. Room temperature
C. Absolute temperature
D. Optimum temperture
Answer» E.
Discussion
19.

The biocatalyst are

A. Enzymes
B. Minerals
C. Plants
D. All proteins
Answer» B. Minerals
Discussion