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

double arrow

single arrow

doted lines

double straight line

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

N_2(g)+ O_2(g) ⇌ 2NO_(g)

H_2(g)+ I_2(g) ⇌ 2HI_(g)

N_2(g)+ 3H_2(g) ⇌ 2NH_3(g)

CO_2(g)+ H_2(g) ⇌ CO_(g)+ H₂O_(l)

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

it depends on the amount of reactants

before the completion of reaction

at any time

after the completion of reaction

4. oxygen and ozone

5. None of these

Temperature

Product concentration

K_c varies with:

Reactant concentration

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

(i) and (ii)

(ii) and (iv)

(iii) and (iv)

(i) and (iv)

7. At the beginning the reaction:

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

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

8. Numbers of moles

Product concentration

K_c is independent of :

Reactant and Product concentration

Reactant concentration

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

Reaction mixture contain almost equal amount of reactant and product

Reaction mixture contain most of the reactant

Reaction mixture contain most of the product

Reaction goes to completion

10. A chemical reaction is a chemical change which involves:

products

None of these

reactants and products

reactants

11. Conversion of ice into the water by melting and conversion of water into ice by freezing is an example of:

irreversible reaction

None of them

chemical reaction

reversible reaction

12. product

Pressure

Density

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

Temperature

13. K_c is equal to 0

the reaction has maximum reactant concentration and minimum product concentration

the concentration of reactants and products is almost same

If K_c is very large, then:

the reaction has maximum product concentration and minimum reactant concentration

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

active mass

atomic mass

density

concentration

15. asher There is decrease in product concentration as the process reverses, forming more reactants.

reactions are virtually complete

If K_c is very small, then:

reactions are considered to be at equilibrium

reactions never finish

16. As the reactant amount decreases, the rate of reactant transformation:

remains the same

increases

becomes zero

decreases

17. equal to 0

Which statement is true if Q_c < K_c?

Increase in product concentration for equilibrium.

The forward reaction occurs, forming additional products

Both of these

18. Which statement is NOT true for reverse reaction?

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

Initially rate is slow but gradually speeds up

All of them

Product produce reactant (Reactants ⟶ Products)

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

chemical reaction

Both chemical and physics reaction

None of these

physical reaction

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

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

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

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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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