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. Which statement is NOT true for reverse reaction?

Product produce reactant (Reactants ⟶ Products)

All of them

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

Initially rate is slow but gradually speeds up

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

reactants

reactants and products

None of these

products

3. Numbers of moles

Product concentration

Reactant concentration

Reactant and Product concentration

K_c is independent of :

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

N_2(g)+ O_2(g) ⇌ 2NO_(g)

N_2(g)+ 3H_2(g) ⇌ 2NH_3(g)

H_2(g)+ I_2(g) ⇌ 2HI_(g)

CO_2(g)+ H_2(g) ⇌ CO_(g)+ H₂O_(l)

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

irreversible reaction

reversible reaction

None of them

chemical reaction

6. product

Temperature

Pressure

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

Density

7. densities

If K_c is larger than 1, the reaction is:

reverse reaction

forward reaction

in equilibrium

8. None of these

If Q_c > K_c:

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

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

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

9. Q_c can be defined as:

ratio of molar concentration of product and reactant at specific time

ratio of molar concentration of product and reactant raised to the power of coefficient

ratio of product and reactants

ratio of molar concentration of product and molar volume of reactant

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

atomic mass

concentration

density

active mass

11. None of them

equal to 1

The reaction is a reverse reaction, if K_c is:

larger than 1

less than 1

12. The system is stable in equilibrium when:

Q_c > K_c

Q_c = K_c

Q_c < K

None of these

13. Which of these are reversible reactions?

None of them

Condensation

Evaporation

Condensation and Evaporation

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

increases

decreases

remains the same

becomes zero

15. The value of K_c increases when:

[Reactant = product]

[Product] is less

[Product] is more

[Reactant] is more

16. 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 lower

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 higher

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

at any time

before the completion of reaction

it depends on the amount of reactants

after the completion of reaction

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

mol^–2 dm⁶

mol dm^–3

no unit

mol^–1 dm³

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

single arrow

double arrow

double straight line

doted lines

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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