Chemistry 10 Chapter 9 MCQs Tests

In this post, we have prepared 3 MCQs tests of Federal Board Chemistry 10 Chapter 9 MCQs Tests. For more Class 10 Chemistry MCQs Tests visit this page.

Chemistry 10 Chapter 9 MCQs Tests

Practice MCQs Test No 1

501

Class 10 Chemistry
Chapter 9
Practice MCQs Test No 1

1 / 10

When a mixture of H₂ and I₂ is sealed in a flask and temperature is kept at 25°C, following equilibrium is established.
H_{2 (g)} + I_{2 (g)} ⇌ 2HI _(g)

Which substance or substances will be present in the equilibrium mixture?

H₂ only

H₂, I₂ and HI

H₂ and I₂

HI only

2 / 10

Which of the following is not the macroscopic characteristic of forward reaction?

Rate is fastest in the beginning and gradually slows down

Products produce reactants

It is written from left to right

Reactants produce products

3 / 10

Active mass means:

Total mass of reactants

Mass of substance in mole / dm³ in dilute solution

Total mass of products

Both A and B

4 / 10

________ and _________ are main gases of the air.

Hydrogen, Oxygen

Nitrogen, Oxygen

Sulphur, Oxygen

Nitrogen, Hydrogen

5 / 10

Ammonia is produced by the reaction of nitrogen and hydrogen at 450 °C, 200 atm pressure in the presence of a catalyst. The process is known as:

Direct Process

Le Chatellier’s process

Haber process

Contact process

6 / 10

Sulphuric acid is produced on the large scale by the process known as:

Le Chatellier’s process

Contact process

Haber process

Direct Process

7 / 10

Concentration of reactants and products at equilibrium remains unchanged if:

All of the above are observed

Concentration of any reactant or product is not changed

Temperature of the reaction is not changed

Pressure or volume of the system is not changed

8 / 10

Which is true about the equilibrium state?

The forward reaction stops

Both forward and reverse reactions stop

The reverse reaction stops

Both forward and reverse reactions continue at the same rate

9 / 10

A double arrow (⇌) indicates:

Irreversible reaction

Forward reaction

Reversible reaction

Reverse reaction

10 / 10

Which of the following catalysts is used to form NH₃ gas from Nitrogen and Hydrogen gas?

Fe

Fe₂O₃

Pt

FeO

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Practice MCQs Test No 2

312

Class 10 Chemistry
Chapter 9
Practice MCQs Test No 2

1 / 8

In an irreversible reaction, equilibrium is:

Never established

Established slowly

Established when reaction stops

Established quickly

2 / 8

What is the unit of equilibrium constant for N_{2 (g)} + O_{2 (g)} ⇌ 2NO _(g)?

No units

dm³ . mol^-1

mol . dm^-3

mol² . dm^-6

3 / 8

For a reversible reaction:
Kc = [C]² / [A][B]  .

The correct equation for above expression is:

C ₂  ⇌ A + B

2C ⇌ A + B

A + B ⇌ 2C

A + B → 2C

4 / 8

For a general reaction

2A + B ⇌ 2C + D.

The rate of forward reaction will be equal to:

K_f [A][B]

K_f [2A][B]

K_f [A]²+[B]

K_f [A]²[B]

5 / 8

Sulphur Trioxide is prepared according to the following reaction:

2SO_{2 (g)} + O_{2 (g)} ⇌ 2SO_{3 (g)}

The condition of this reaction is:

Fe / 400 °C , 200 atm

Fe / 400 °C , 200 atm

Ni / 450 °C , 200 atm

V₂O₅ / 450 °C , 200 atm

Electric Spark

6 / 8

Which of the following reaction will not have any units for Kc?

2A _(g) + B _(g) ⇌ 3AC _(g)

H_{2 (g)} + CO_{2 (g)} ⇌ H₂O _(g) + CO _(g)

N_{2 (g)} + O_{2 (g)} ⇌ 2NO _(g)

2A _(g) + B _(g) ⇌ 3AC _(g)

All of these

7 / 8

What is the unit of equilibrium constant for N_{2 (g)} + 2O_{2 (g)} ⇌ 2NO_{2 (g)}?

No units

dm³ . mol^-1

mol . dm^-3

mol² . dm^-6

8 / 8

At equilibrium state of a reversible reaction:

Concentrations of the reactants become zero

Concentrations of reactants and products become equal

Concentration of reactants and products become constant

Forward and reverse reactions are stopped

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Full Chapter MCQs Quiz Test

393

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Class 10 Chemistry
Chapter 9
MCQs Quiz Test

1 / 18

When a mixture of H₂ and I₂ is sealed in a flask and temperature is kept at 25°C, following equilibrium is established.
H_{2 (g)} + I_{2 (g)} ⇌ 2HI _(g)

Which substance or substances will be present in the equilibrium mixture?

HI only

H₂, I₂ and HI

H₂ only

H₂ and I₂

2 / 18

In an irreversible reaction, equilibrium is:

Established slowly

Established quickly

Established when reaction stops

Never established

3 / 18

Sulphur Trioxide is prepared according to the following reaction:

2SO_{2 (g)} + O_{2 (g)} ⇌ 2SO_{3 (g)}

The condition of this reaction is:

Fe / 400 °C , 200 atm

V₂O₅ / 450 °C , 200 atm

Fe / 400 °C , 200 atm

Ni / 450 °C , 200 atm

Electric Spark

4 / 18

What is the unit of equilibrium constant for N_{2 (g)} + O_{2 (g)} ⇌ 2NO _(g)?

mol . dm^-3

No units

mol² . dm^-6

dm³ . mol^-1

5 / 18

Which of the following catalysts is used to form NH₃ gas from Nitrogen and Hydrogen gas?

Fe

FeO

Fe₂O₃

Pt

6 / 18

A double arrow (⇌) indicates:

Irreversible reaction

Forward reaction

Reversible reaction

Reverse reaction

7 / 18

Which of the following reaction will not have any units for Kc?

2A _(g) + B _(g) ⇌ 3AC _(g)

H_{2 (g)} + CO_{2 (g)} ⇌ H₂O _(g) + CO _(g)

All of these

2A _(g) + B _(g) ⇌ 3AC _(g)

N_{2 (g)} + O_{2 (g)} ⇌ 2NO _(g)

8 / 18

For a general reaction

2A + B ⇌ 2C + D.

The rate of forward reaction will be equal to:

K_f [A]²+[B]

K_f [A]²[B]

K_f [A][B]

K_f [2A][B]

9 / 18

At equilibrium state of a reversible reaction:

Forward and reverse reactions are stopped

Concentrations of reactants and products become equal

Concentration of reactants and products become constant

Concentrations of the reactants become zero

10 / 18

Which is true about the equilibrium state?

The reverse reaction stops

Both forward and reverse reactions stop

The forward reaction stops

Both forward and reverse reactions continue at the same rate

11 / 18

Concentration of reactants and products at equilibrium remains unchanged if:

All of the above are observed

Temperature of the reaction is not changed

Pressure or volume of the system is not changed

Concentration of any reactant or product is not changed

12 / 18

Ammonia is produced by the reaction of nitrogen and hydrogen at 450 °C, 200 atm pressure in the presence of a catalyst. The process is known as:

Contact process

Direct Process

Le Chatellier’s process

Haber process

13 / 18

What is the unit of equilibrium constant for N_{2 (g)} + 2O_{2 (g)} ⇌ 2NO_{2 (g)}?

mol² . dm^-6

No units

mol . dm^-3

dm³ . mol^-1

14 / 18

For a reversible reaction:
Kc = [C]² / [A][B]  .

The correct equation for above expression is:

C ₂  ⇌ A + B

A + B ⇌ 2C

2C ⇌ A + B

A + B → 2C

15 / 18

Which of the following is not the macroscopic characteristic of forward reaction?

Rate is fastest in the beginning and gradually slows down

It is written from left to right

Reactants produce products

Products produce reactants

16 / 18

Active mass means:

Total mass of products

Mass of substance in mole / dm³ in dilute solution

Both A and B

Total mass of reactants

17 / 18

________ and _________ are main gases of the air.

Sulphur, Oxygen

Hydrogen, Oxygen

Nitrogen, Oxygen

Nitrogen, Hydrogen

18 / 18

Sulphuric acid is produced on the large scale by the process known as:

Direct Process

Contact process

Le Chatellier’s process

Haber process

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