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

reactions are virtually complete

reactions are considered to be at equilibrium

reactions never finish

If K_c is very small, then:

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

CO_2(g)+ H_2(g) ⇌ CO_(g)+ H₂O_(l)

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)

3. product

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

Pressure

Temperature

Density

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

double arrow

single arrow

double straight line

doted lines

5. None of these

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

K_c is very large

K_c is neither very small nor very large

K_c is very small

6. The state of dynamic equilibrium can be represented by:

Rate of the forward reaction > Rate of the reverse reaction

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

7. oxygen and ozone

8. A reversible reaction containing:

two processes

three processes

four processes

one process

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

(i) and (ii)

(ii) and (iv)

(i) and (iv)

(iii) and (iv)

10. 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

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

Reaction mixture contain most of the reactant

Reaction mixture contain almost equal amount of reactant and product

Reaction goes to completion

Reaction mixture contain most of the product

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

chemical reaction

physical reaction

Both chemical and physics reaction

None of these

13. 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

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

no unit

mol dm^–3

mol^–2 dm⁶

mol^–1 dm³

15. None of these

Reactant concentration

Temperature

Product concentration

K_c varies with:

16. 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

If K_c is very large, then:

the reaction has maximum product concentration and minimum reactant concentration

17. equal to 0

Which statement is true if Q_c < K_c?

Both of these

The forward reaction occurs, forming additional products

Increase in product concentration for equilibrium.

18. Which statement is NOT true for reverse reaction?

All of them

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

Initially rate is slow but gradually speeds up

Product produce reactant (Reactants ⟶ Products)

19. The value of K_c increases when:

[Product] is more

[Reactant = product]

[Reactant] is more

[Product] is less

20. None of them

equal to 1

less than 1

larger than 1

The reaction is a reverse reaction, if K_c is:

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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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