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. At the beginning the reaction:

quantity of reactant is lower, and the rate of product formation is lower

quantity of reactant is higher, and the rate of product formation is higher

quantity of reactant is higher, and the rate of product formation is lower

quantity of reactant is lower, and the rate of product formation is higher

2. oxygen and ozone

3. None of them

These are the most important part of the atmosphere.

nitrogen and oxygen

carbon dioxide and methane

oxygen and carbon dioxide

4. Which reactions are irreversible reactions?
(i) Condensation
(ii) Combustion
(iii) Melting
(iv) Rusting

(i) and (iv)

(iii) and (iv)

(i) and (ii)

(ii) and (iv)

5. None of them

The reaction is a reverse reaction, if K_c is:

less than 1

equal to 1

larger than 1

6. The state of dynamic equilibrium can be represented by:

Rate of the forward reaction < Rate of the reverse reaction

Rate of the forward reaction > Rate of the reverse reaction

Rate of the forward reaction = Rate of the reverse reaction

Rate of the forward reaction = Rate of the reverse reaction = 0

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

before the completion of reaction

after the completion of reaction

at any time

it depends on the amount of reactants

8. product

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

Density

Pressure

Temperature

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

doted lines

single arrow

double arrow

double straight line

10. Many physical and chemical changes are occurring in our surrounding which may be due to:

Both chemical and physics reaction

None of these

chemical reaction

physical reaction

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

None of them

products and reacting substances

products

reacting substances

12. Which of these are reversible reactions?

Evaporation

Condensation and Evaporation

None of them

Condensation

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

reactants

reactants and products

temperature

products

14. The value of K_c increases when:

[Product] is more

[Reactant] is more

[Reactant = product]

[Product] is less

15. K_c = :

product / reactant

reactant / product

reactant x product

reactant

16. Which statement is TRUE for a forward reaction?

Initially rate is fast but gradually slows down

All of them

Product produces reactant

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

17. A reaction which is never goes to completion is known as reversible reaction. Reversible reaction is represented by:

doted lines

double straight line

single arrow

double arrow

18. Equilibrium is a state in which:

forward reaction rate and reverse reaction rate are equal

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

19. None of these

K_c is very large

K_c is very small

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

K_c is neither very small nor very large

20. For which system does the equilibrium constant, K_c has units of concentration?

CO_2(g)+ H_2(g) ⇌ CO_(g)+ H₂O_(l)

H_2(g)+ I_2(g) ⇌ 2HI_(g)

N_2(g)+ 3H_2(g) ⇌ 2NH_3(g)

N_2(g)+ O_2(g) ⇌ 2NO_(g)

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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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