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

mol^–2 dm⁶

mol^–1 dm³

no unit

mol dm^–3

2. 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

3. Q_c can be defined as:

ratio of product and reactants

ratio of molar concentration of product and reactant raised to the power of coefficient

ratio of molar concentration of product and molar volume of reactant

ratio of molar concentration of product and reactant at specific time

4. None of them

The reaction is a reverse reaction, if K_c is:

equal to 1

less than 1

larger than 1

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

chemical reaction

None of them

reversible reaction

irreversible reaction

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

(i) and (iv)

(ii) and (iv)

(i) and (ii)

(iii) and (iv)

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

single arrow

double arrow

doted lines

double straight line

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

N_2(g)+ 3H_2(g) ⇌ 2NH_3(g)

N_2(g)+ O_2(g) ⇌ 2NO_(g)

H_2(g)+ I_2(g) ⇌ 2HI_(g)

CO_2(g)+ H_2(g) ⇌ CO_(g)+ H₂O_(l)

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

products

temperature

reactants and products

reactants

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

reactions never finish

If K_c is very small, then:

reactions are virtually complete

reactions are considered to be at equilibrium

11. None of these

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

K_c is very small

K_c is very large

K_c is neither very small nor very large

12. Which statement is NOT true for reverse reaction?

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

Product produce reactant (Reactants ⟶ Products)

All of them

Initially rate is slow but gradually speeds up

13. Equilibrium is a state in which:

the forward reaction rate is less than the reverse reaction rate

forward reaction rate and reverse reaction rate become zero

forward reaction rate and reverse reaction rate are equal

the forward reaction rate is more than the reverse reaction rate

14. oxygen and ozone

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

single arrow

double arrow

doted lines

double straight line

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

products

products and reacting substances

None of them

reacting substances

17. The value of K_c increases when:

[Reactant] is more

[Product] is more

[Reactant = product]

[Product] is less

18. 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

19. None of them

These are the most important part of the atmosphere.

carbon dioxide and methane

oxygen and carbon dioxide

nitrogen and oxygen

20. K_c = :

reactant / product

product / reactant

reactant

reactant x product

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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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