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. 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

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

no unit

mol^–2 dm⁶

mol^–1 dm³

mol dm^–3

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

reacting substances

None of them

products

products and reacting substances

4. None of them

carbon dioxide and methane

oxygen and carbon dioxide

nitrogen and oxygen

These are the most important part of the atmosphere.

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

concentration

atomic mass

active mass

density

6. None of these

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.

If Q_c > K_c:

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

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

decreases

increases

remains the same

becomes zero

8. product

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

Density

Temperature

Pressure

9. densities

reverse reaction

If K_c is larger than 1, the reaction is:

forward reaction

in equilibrium

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

doted lines

double arrow

double straight line

single arrow

11. K_c is equal to 0

the reaction has maximum product concentration and minimum reactant concentration

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:

12. Numbers of moles

K_c is independent of :

Product concentration

Reactant concentration

Reactant and Product concentration

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

(ii) and (iv)

(i) and (iv)

(iii) and (iv)

(i) and (ii)

14. equal to 0

Increase in product concentration for equilibrium.

Both of these

The forward reaction occurs, forming additional products

Which statement is true if Q_c < K_c?

15. None of these

K_c is neither very small nor very large

K_c is very large

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

K_c is very small

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

single arrow

double straight line

double arrow

doted lines

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

Reaction mixture contain most of the product

Reaction mixture contain almost equal amount of reactant and product

Reaction goes to completion

Reaction mixture contain most of the reactant

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

reactants

temperature

reactants and products

products

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

products

reactants

None of these

reactants and products

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

If K_c is very small, then:

reactions are virtually complete

reactions never finish

reactions are considered to be at equilibrium

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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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