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. Numbers of moles

Reactant concentration

K_c is independent of :

Product concentration

Reactant and Product concentration

2. None of them

oxygen and carbon dioxide

These are the most important part of the atmosphere.

nitrogen and oxygen

carbon dioxide and methane

3. K_c is equal to 0

the reaction has maximum reactant concentration and minimum product concentration

If K_c is very large, then:

the concentration of reactants and products is almost same

the reaction has maximum product concentration and minimum reactant concentration

4. Equilibrium is a state in which:

the forward reaction rate is less than the reverse reaction rate

forward reaction rate and reverse reaction rate are equal

forward reaction rate and reverse reaction rate become zero

the forward reaction rate is more than the reverse reaction rate

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

(iii) and (iv)

(i) and (iv)

(i) and (ii)

(ii) and (iv)

6. product

Density

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

Pressure

Temperature

7. None of these

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 reactants.

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

If Q_c > K_c:

8. None of these

K_c is very small

K_c is neither very small nor very large

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

K_c is very large

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

products

reactants

reactants and products

None of these

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

doted lines

double arrow

single arrow

double straight line

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

Reaction mixture contain most of the product

Reaction mixture contain most of the reactant

Reaction goes to completion

Reaction mixture contain almost equal amount of reactant and product

12. Which statement is TRUE for a forward reaction?

All of them

Initially rate is fast but gradually slows down

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

Product produces reactant

13. Which of these are reversible reactions?

Condensation and Evaporation

Evaporation

None of them

Condensation

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

after the completion of reaction

at any time

before the completion of reaction

it depends on the amount of reactants

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

physical reaction

None of these

Both chemical and physics reaction

chemical reaction

16. 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)

17. densities

forward reaction

reverse reaction

If K_c is larger than 1, the reaction is:

in equilibrium

18. The system is stable in equilibrium when:

Q_c = K_c

Q_c > K_c

None of these

Q_c < K

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

increases

decreases

becomes zero

remains the same

20. At the beginning the reaction:

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 higher

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

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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