Explore topic-wise MCQs in SRMJEEE .

This section includes 50 Mcqs, each offering curated multiple-choice questions to sharpen your SRMJEEE knowledge and support exam preparation. Choose a topic below to get started.

1.

A vessel at 1000 K contains CO2 with a pressure of 0.5 atm. Some of the CO2 is converted into CO on the addition of graphite. If the total pressure at equilibrium is 0.8 atm, the value of K is [AIEEE 2011]

A. 0.18 atm
B. 1.8 atm
C. 3 atm
D. 0.3 atm
Answer» C. 3 atm
Discussion
2.

0.023 g of sodium metal is reacted with 100 cm3 of water. The pH of the resulting solution is ______. [Karnataka CET 2011]

A. 10
B. 8
C. 9
D. 12
Answer» E.
Discussion
3.

pH of a saturated solution of Ba(OH)2 is 12. The value of solubility product (Ksp) of Ba(OH)2 is [CBSE AIPMT 2012]

A. 4.0 × 10–6
B. 5.0 × 10–6
C. 3.3 × 10–7
D. 5.0 × 10–7
Answer» E.
Discussion
4.

Buffer solutions have constant acidity and alkalinity because [CBSE AIPMT 2012]

A. They have large excess of H+ or OH– ions
B. They have fixed value of pH
C. These give unionised acid or base on reaction with added acid or alkali
D. Acids and alkalies in these solutions are shielded from attack by other ions
Answer» D. Acids and alkalies in these solutions are shielded from attack by other ions
Discussion
5.

What is represented by each figure within a square bracket in equilibrium expression?

A. Concentration in mol.dm-3
B. Volume of products
C. Mass of products
D. Mass of reactants
Answer» B. Volume of products
Discussion
6.

Unit of equilibrium constant for CO + 2H2 CH3OH is

A. No units
B. mol dm-3
C. dm3mol-1
D. [mol dm-3]-2
Answer» E.
Discussion
7.

In equilibrium constant expression, concentration of reactants is taken in/on the

A. Right side
B. Left side
C. Numerator
D. Denominator
Answer» E.
Discussion
8.

Ratio of product of concentration of products to product of concentration of reactants is called

A. Equilibrium constant
B. Equilibrium ratio
C. Reverse reaction
D. Forward reaction
Answer» B. Equilibrium ratio
Discussion
9.

 Substances which increase rate of a chemical reaction are called

A. Proteins
B. Single cell protein
C. Enzymes
D. Catalysts
Answer» E.
Discussion
10.

Kf and Kr are

A. Equilibrium constants
B. Reaction constants
C. Chemical constants
D. Rate constants
Answer» E.
Discussion
11.

 Which of following reactions causes acid droplets to spew in all directions?

A. Acid base reaction
B. Combustion
C. Vigorous reaction
D. Decomposition
Answer» D. Decomposition
Discussion
12.

Law of mass action was proposed by

A. Newton
B. Le chatellier
C. C.M Guldberg and P.Waage
D. Lewis
Answer» D. Lewis
Discussion
13.

Which of following statements about equilibrium constant is not true?

A. It is very useful
B. It is independent of the initial concentration of reactants
C. It does not depend upon temperature
D. It depends upon temperature
Answer» D. It depends upon temperature
Discussion
14.

 Unit of equilibrium constant for N2O4 2NO2 is

A. No units
B. mol dm-3
C. dm3mol-1
D. None of these
Answer» C. dm3mol-1
Discussion
15.

Which of following has made it possible to get maximum amount of products?

A. Le chatelliers principle
B. Charles law
C. Boyles law
D. Snells law
Answer» B. Charles law
Discussion
16.

What is term used for a state of a chemical reaction in which forward and reverse reactions take place at same rate?

A. Chemical equilibrium
B. Stable reaction
C. Reversible reaction
D. Forward reaction
Answer» B. Stable reaction
Discussion
17.

A reversible reaction

A. always completes
B. never goes to completion
C. Spontaneous reactions
D. non spontaneous reactions
Answer» C. Spontaneous reactions
Discussion
18.

Conditions for equilibrium of concentration of reactant and products will be same if

A. temperature is constant
B. pressure or volume is constant
C. concentration of products and reactants are same
D. all of above
Answer» E.
Discussion
19.

If concentration, temperature and pressure is changed, system responds in a way that

A. follows the change
B. opposes the change
C. does not change at all
D. encourages the change
Answer» C. does not change at all
Discussion
20.

A substance which increases rate of reaction is called

A. catalyst
B. reactant
C. product
D. coordinator
Answer» B. reactant
Discussion
21.

Which of following statements about catalysts is not true?

A. They speed up a chemical reaction
B. They reduce the time taken to reach equilibrium
C. They have effect on the position of equilibrium once it is reached
D. They have no effect on the position of equilibrium one it is reached
Answer» D. They have no effect on the position of equilibrium one it is reached
Discussion
22.

If a change is imposed in concentration, temperature or pressure on a chemical system at equilibrium, system responds in a way that change is

A. Not opposed
B. Opposed
C. Rapidly increased
D. None of these
Answer» C. Rapidly increased
Discussion
23.

Process by which ammonia is produced by reaction of nitrogen with hydrogen at 200 atm pressure and in presence of a catalyst is called

A. Contact process
B. Recovery of ammonia
C. Calcination
D. Haber process
Answer» E.
Discussion
24.

Equilibrium constant can be used to

A. predict direction of chemical reaction
B. predict extent of chemical reaction
C. determine the equilibrium concentration of mixture
D. all of above
Answer» E.
Discussion
25.

Reactions in which reactants react to form products and simultaneously products reverse back in to reactants are called

A. Reversible reactions
B. Irreversible reaction
C. Spontaneous reactions
D. non spontaneous reactions
Answer» B. Irreversible reaction
Discussion
26.

Rate at which a substance reacts is directly proportional to its

A. Product
B. Active mass
C. Reactant
D. None of these
Answer» C. Reactant
Discussion
27.

 What is established when rate of evaporation equals rate of condensation?

A. Equality
B. Equilibrium
C. Reversible reaction
D. Irreversible reaction
Answer» C. Reversible reaction
Discussion
28.

 In Haber's process amount of ammonia yields is

A. 40%
B. 90%
C. 33%
D. 22%
Answer» D. 22%
Discussion
29.

What percentage of ammonia is produced at equilibrium by Haber process?

A. 20 percent
B. 33 percent
C. 100 percent
D. 99 percent
Answer» C. 100 percent
Discussion
30.

What is denoted by subscript 'c' in Kc ?

A. Chemical equilibrium
B. Chemical reaction
C. Molar concentration at equilibrium
D. Rate of chemical reaction
Answer» D. Rate of chemical reaction
Discussion
31.

Unit of equilibrium constant for PCl5 PCl3 + Cl2

A. No units
B. mol dm-3
C. dm3mol-1
D. [mol dm-3]-2
Answer» C. dm3mol-1
Discussion
32.

Unit of equilibrium constant for 2NO + O2 2NO2 is

A. No units
B. mol dm-3
C. dm3mol-1
D. None of these
Answer» D. None of these
Discussion
33.

 Rate at which reaction proceeds is directly related to

A. active masses of reactants
B. sum of active masses of reactants
C. product of active masses of reactants
D. ratio of active masses of reactants
Answer» D. ratio of active masses of reactants
Discussion
34.

Which process is used for large scale production of sulphuric acid?

A. Contact process
B. Haber process
C. Sulphuric acid process
D. None of these
Answer» B. Haber process
Discussion
35.

Which of following is used as catalyst in contact process?

A. Zeolite
B. Ag
C. Pd
D. Pt
Answer» E.
Discussion
36.

State at which forward and reverse reactions occur at same rate is

A. equilibrium
B. unstable equilibrium
C. not in equilibrium
D. neutral equilibrium
Answer» B. unstable equilibrium
Discussion
37.

When diluting acid always add

A. water to acid
B. acid to water
C. can be both ways
D. acid cannot be diluted
Answer» C. can be both ways
Discussion
38.

 Equilibrium constant can be used to determine equilibrium concentration of equilibrium mixture knowing the

A. Final concentration of products
B. Final concentration of reactants
C. Initial concentration of reactants
D. Initial concentration of products
Answer» D. Initial concentration of products
Discussion
39.

Term "active mass" shows concentration of reactants and products in

A. Mol.dm-3 for a dilute solution
B. Mol.cm-3 for a dilute solution
C. Mol.dm-3 for a concentrated solution
D. Mol.cm-3 for a concentrated solution
Answer» B. Mol.cm-3 for a dilute solution
Discussion
40.

Relationship by which values that relate amounts of products to reactants at equilibrium can be determined, is called

A. Law of conservation of mass
B. Law of chemical reactions
C. Law of mass action
D. Active mass
Answer» D. Active mass
Discussion
41.

Unit of equilibrium constant for N2 + O2 2NO is

A. No units
B. mol dm-3
C. dm3mol-1
D. [mol dm-3]-2
Answer» B. mol dm-3
Discussion
42.

In reverse reaction SO3 decomposes in to

A. S and O
B. S and O2
C. S2 and O
D. SO2 and O2
Answer» E.
Discussion
43.

Due to high concentration of reactants, rate of forward reaction is

A. lowest
B. moderate
C. highest
D. minimal
Answer» D. minimal
Discussion
44.

What percentage of ammonia is given after cooling equilibrium mixture by Haber process?

A. 20 percent
B. 33 percent
C. 100 percent
D. 98 percent
Answer» E.
Discussion
45.

Unit of equilibrium constant for H2 + CO2 H2O + CO is

A. No units
B. mol dm-3
C. dm3mol-1
D. [mol dm-3]-2
Answer» B. mol dm-3
Discussion
46.

Which of following is correct representation for "active mass"?

A. ( )
B. { }
C. [ ]
D. Bar
Answer» D. Bar
Discussion
47.

Rate at which reaction proceeds is directly proportional to

A. Product of the active masses of products
B. Product of the active masses of reactants
C. Both A and B
D. None of these
Answer» C. Both A and B
Discussion
48.

What is representation of a reversible reaction?

A. Single arrow
B. Double arrows
C. Bar
D. None of these
Answer» C. Bar
Discussion
49.

 Unit of equilibrium constant for H2 + I2 2HI is

A. No units
B. mol dm-3
C. dm3mol-1
D. None of these
Answer» B. mol dm-3
Discussion
50.

 In equilibrium constant expression, concentration of products is taken in/on the

A. Right side
B. Left side
C. Numerator
D. Denominator
Answer» D. Denominator
Discussion