1st Year Chemistry Chapter 7 Chemical Equilibrium MCQs with Answers

You are going to get the 1st Year Chemistry Chapter 7 Chemical Equilibrium MCQs with Answers here. These multiple-type questions will help you to prepare for the entry test. This chapter is based on Chemical Equilibrium which is the state in which the rate of the forwarding reaction becomes equal to the rate of the reverse reaction. There are two types of equilibrium that are homogenous and heterogeneous equilibrium. Then there are reversible and irreversible reactions. The law of Mass Action states that the rate at which the reaction proceeds is directly proportional to the product of the active masses of the reactants or their mass concentration. There is the last concept of Le Chatelier’s Principle and Lowry Bronsted Acid and Base Concept. So, start preparing for the entrance test through the following MCQs.

1st Year Chemistry Chapter 7 Chemical Equilibrium MCQs with Answers

418

Chemistry Chapter 7

1 / 20

pOH of human blood is:

7.0

7.85

7.35

6.65

2 / 20

The pH value of 0.001 M HCl solution in water is:

Zero

3 / 20

The almost forward reaction is complete when:

Kc is very large

Moderate Kc value

Kc is very small

None of these

4 / 20

The value of pKw at 25^o C is:

10^14

10^–14

5 / 20

The strength of an acid is directly related to the value of:

pKa

6 / 20

In which of the following reactions, the increases in pressure move the reaction in the forward direction

H2 + I2 ⇌ 2HI

2SO2(g) + O2(g) ⇌ 2 SO3

PCl5(g) ⇌ PCl3(g) + Cl2(g)

N2 + O2 ⇌ 2NO

7 / 20

Which of the followings are the applications of Ksp

Determination of Ksp from solubility

Determination of solubility from Ksp

saturation for a given solute in solution

All of these

8 / 20

The best buffer is prepared by taking

Equal conc. of salt and acid

More conc. of salt than acid

More conc. of acid than salt

Any of these

9 / 20

Which statement about the following is correct?

2SO₂(g) + O₂ (g) ⇌ 2 SO₃ (g) DH = -188.3 kJ mol^-1

The value of Kp falls with rise of temperature

The value of Kp falls with increasing pressure

Adding V2O5 catalyst increase the equilibrium yield of SO3

The value of Kp is equal to Kc

10 / 20

The pH of 10^{– 3} mol dm^–3 of an aqueous solution of H₂ SO₄ is

3.0

2.7

2.0

1.5

11 / 20

Given that the pKa of acetic acid is 4.7, what is pH of the solution of 0.1M acetic acid and 0.01 sodium acetate is

3.7

4.7

5.7

2.7

12 / 20

The solubility product of AgCl is 2 ´ 10 ^–10 mol2dm^–6. Maximum Ag+ ion in solution is

2 x10 ^–10mol dm^–3

1 x 10 ^–10mol dm^–3

41 x 10 ^–5 mol dm^–3

4 x 10 ^–10 mol dm^–3

13 / 20

Which is correct about the common ion effect

Best application of Le-Chatlier’s principle

It is the effect of increase in concentration of product in form of common ion

Always in reverse direction

All of these

14 / 20

The equation used to calculate the pH of acidic buffer solution is pH = pka + [ ] [ ] salt log acid which of the following is correct about equation

pH = pka when [acid] = [salt]

pH > pka when [acid] < [salt]

pH < pka when [acid] > [salt]

All of the above

15 / 20

Which is the correct statement?

Conjugate base of the weak acid is weak

Greater is ka value, greater is kb

Greater is molar conc. Of H+ greater is pH

Greater is ka value smaller is pka value

16 / 20

Oxidation of SO₂ by O₂ is an exothermic reaction. The yield of SO₃ will be maximum if

Temperature is increased and pressure is kept constant

Temperature is reduced and pressure is increased

Both temperature and pressure are increased

Both temperature and pressure are decreased

17 / 20

Which of the following relationship is incorrect?

Kp = Kc when Dn = 0

Kp < Kc when Dn < 0

Kp > Kc when Dn > 0

Kp ¹ Kc when Dn = 0

18 / 20

In which of the following reactions, Kc has moles^–2 dm+6 unit

N2(g) + 3H2(g) ⇌ 2 NH3(g)

PCl5(g) ⇌ PCl3(g) + Cl2(g)

CH3COOH+ C2H5OH ⇌ CH3COOC2H5 + H2O

2SO2(g) + O2(g) ⇌ 2 SO3(g)

19 / 20

Which of the following is the correct statement about “Kc”?

May or may not have a units

Thermodynamic property

depend upon equilibrium concentrations

All of the above

20 / 20

Kc value does not depend on all the factors except

Pressure

constant at constant temperature

Catalyst

Temperature

Your score is

1st Year Chemistry Chapter 7 Chemical Equilibrium MCQs with Answers

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