Online MCQs – Chemical Equilibrium – Chemistry 10th

Class 10th | Chemistry | Chapter 1 | Chemical Equilibrium | Solved Online MCQs Test

Online MCQs Test of Chapter 1 (Chemical Equilibrium) Chemistry Class 10th Science Group – Sindh Board. According to New Examination Pattern / Syllabus of Sindh Board

1. The system is stable in equilibrium when:

None of these

Q_c > K_c

Q_c = K_c

Q_c < K

2. None of them

equal to 1

The reaction is a reverse reaction, if K_c is:

larger than 1

less than 1

3. The reaction rate depends on the concentration of the:

reactants

products

temperature

reactants and products

4. product

It is the single factor affecting the equilibrium constant’s value.

Density

Pressure

Temperature

5. A reversible reaction containing:

four processes

two processes

three processes

one process

6. The unit of K_c for reaction N₂ + O₂ ⇌ 2NO

mol^–2 dm⁶

mol dm^–3

no unit

mol^–1 dm³

7. Equilibrium is a state in which:

forward reaction rate and reverse reaction rate become zero

the forward reaction rate is less than the reverse reaction rate

the forward reaction rate is more than the reverse reaction rate

forward reaction rate and reverse reaction rate are equal

8. The rate of a reaction is directly proportional to the product of the active masses of the:

products

products and reacting substances

None of them

reacting substances

9. None of these

This type of reaction is known as ‘Forward reaction’.

K_c is neither very small nor very large

K_c is very small

K_c is very large

10. The direction of a reaction can be predicted by the type of arrow:

double straight line

single arrow

doted lines

double arrow

11. The rate at which a substance reacts is directly proportional to its:

density

concentration

atomic mass

active mass

12. When the magnitude of K_c is small, indicates:

Reaction goes to completion

Reaction mixture contain most of the product

Reaction mixture contain almost equal amount of reactant and product

Reaction mixture contain most of the reactant

13. None of these

If Q_c > K_c:

There is increase in product concentration as the process reverses, forming more reactants.

There is increase in product concentration as the process reverses, forming more products.

There is decrease in product concentration as the process reverses, forming more products.

14. In a reversible reaction, dynamic equilibrium is established:

at any time

after the completion of reaction

before the completion of reaction

it depends on the amount of reactants

15. Which statement is NOT true for reverse reaction?

Initially rate is slow but gradually speeds up

All of them

It is always directed from left to right in a chemical reaction

Product produce reactant (Reactants ⟶ Products)

16. K_c = :

reactant / product

reactant x product

product / reactant

reactant

17. The value of K_c increases when:

[Reactant = product]

[Product] is more

[Reactant] is more

[Product] is less

18. Numbers of moles

Reactant and Product concentration

K_c is independent of :

Reactant concentration

Product concentration

19. Which statement is TRUE for a forward reaction?

It is always directed from right to left in a chemical reaction

All of them

Initially rate is fast but gradually slows down

Product produces reactant

20. equal to 0

Increase in product concentration for equilibrium.

Which statement is true if Q_c < K_c?

Both of these

The forward reaction occurs, forming additional products

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Online MCQs Test preparation for Chemistry Class 10th (Science Group Sindh Board) helps students practice effectively. These multiple-choice questions are taken from Chapter 1 “Chemical Equilibrium” of the Class 10th Chemistry textbook. They fully cover the requirements of the objective section in the examination. This activity is a valuable resource for excellent exam preparation. The Online MCQs Test provides students with the best platform to assess their knowledge and practice independently.

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