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 one is not a reversible reaction?

Evaporation

Combustion

Melting

Freezing

2. 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

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

chemical reaction

reversible reaction

irreversible reaction

None of them

4. densities

in equilibrium

reverse reaction

If K_c is larger than 1, the reaction is:

forward reaction

5. Equilibrium is a state in which:

forward reaction rate and reverse reaction rate are equal

the forward reaction rate is more than the reverse reaction rate

forward reaction rate and reverse reaction rate become zero

the forward reaction rate is less than the reverse reaction rate

6. The system is stable in equilibrium when:

None of these

Q_c > K_c

Q_c = K_c

Q_c < K

7. None of these

Temperature

Reactant concentration

K_c varies with:

Product concentration

8. Which of these are reversible reactions?

None of them

Evaporation

Condensation

Condensation and Evaporation

9. 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 higher

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

10. A reversible reaction containing:

one process

three processes

two processes

four processes

11. equal to 0

Which statement is true if Q_c < K_c?

Increase in product concentration for equilibrium.

Both of these

The forward reaction occurs, forming additional products

12. product

Temperature

Density

Pressure

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

13. None of these

K_c is very large

K_c is neither very small nor very large

K_c is very small

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

14. None of them

These are the most important part of the atmosphere.

nitrogen and oxygen

carbon dioxide and methane

oxygen and carbon dioxide

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

reactions are considered to be at equilibrium

reactions are virtually complete

reactions never finish

If K_c is very small, then:

16. oxygen and ozone

17. K_c is equal to 0

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:

the concentration of reactants and products is almost same

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

CO_2(g)+ H_2(g) ⇌ CO_(g)+ H₂O_(l)

H_2(g)+ I_2(g) ⇌ 2HI_(g)

N_2(g)+ O_2(g) ⇌ 2NO_(g)

N_2(g)+ 3H_2(g) ⇌ 2NH_3(g)

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

doted lines

single arrow

double straight line

double arrow

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

no unit

mol^–1 dm³

mol dm^–3

mol^–2 dm⁶

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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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