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. Q_c can be defined as:

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 reactant at specific time

ratio of molar concentration of product and molar volume of reactant

2. Equilibrium is a state in which:

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

forward reaction rate and reverse reaction rate are equal

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

products and reacting substances

None of them

products

reacting substances

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

chemical reaction

physical reaction

None of these

Both chemical and physics reaction

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

Reaction mixture contain most of the product

Reaction goes to completion

Reaction mixture contain almost equal amount of reactant and product

Reaction mixture contain most of the reactant

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

reversible reaction

chemical reaction

None of them

irreversible reaction

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 products.

If Q_c > K_c:

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

8. Numbers of moles

K_c is independent of :

Product concentration

Reactant and Product concentration

Reactant concentration

9. None of these

Product concentration

Temperature

Reactant concentration

K_c varies with:

10. 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

11. product

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

Density

Pressure

Temperature

12. 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

13. equal to 0

The forward reaction occurs, forming additional products

Which statement is true if Q_c < K_c?

Increase in product concentration for equilibrium.

Both of these

14. The value of K_c increases when:

[Product] is less

[Product] is more

[Reactant = product]

[Reactant] is more

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

reactants and products

products

reactants

None of these

16. densities

forward reaction

If K_c is larger than 1, the reaction is:

reverse reaction

in equilibrium

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

(i) and (iv)

(ii) and (iv)

(iii) and (iv)

(i) and (ii)

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

decreases

increases

becomes zero

remains the same

19. K_c is equal to 0

the concentration of reactants and products is almost same

the reaction has maximum reactant concentration and minimum product concentration

the reaction has maximum product concentration and minimum reactant concentration

If K_c is very large, then:

20. oxygen and ozone

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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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