Live Education Quiz

1

Which salt is formed by strong acid and weak base?

A Neutral salt B Basic salt C Acidic salt D Double salt

2

A solution with pH greater than 7 is:

A Acidic B Neutral C Basic D Saline

3

Which of the following is a basic oxide?

A SO₂ B CO₂ C Na₂O D NO₂

4

Which indicator gives different colors at different pH values?

A Litmus B Phenolphthalein C Methyl orange D Universal indicator

5

According to Arrhenius, an acid is a substance that produces:

A OH⁻ ions in water B H⁺ ions in water C Salt only D Electrons

6

Le Chatelier’s principle explains the effect of:

A Temperature only B Pressure only C Disturbances on equilibrium D Catalyst

7

The ionic product of water (Kw) at 25°C is:

A 1 × 10⁻⁷ B 1 × 10⁻¹⁴ C 1 × 10⁻¹² D 1 × 10⁻⁵

8

Which acid is present in lemon?

A Oxalic acid B Citric acid C Acetic acid D Formic acid

9

According to Arrhenius, a base produces which ion in water?

A H⁺ B Na⁺ C OH⁻ D Cl⁻

10

Equilibrium constant is independent of:

A Temperature B Catalyst C Nature of reaction D Stoichiometry

11

For the reaction N2 + 3H2 ⇌ 2NH3, the equilibrium expression is:

A [N2][H2]3 / [NH3]2 B [NH3]2 / [N2][H2]3 C [NH3] / [N2][H2] D [N2] / [NH3]

12

A catalyst affects equilibrium by:

A Changing equilibrium constant B Shifting equilibrium C Increasing rate of both reactions D Stopping reverse reaction

13

In dynamic equilibrium:

A No reaction occurs B Only forward reaction occurs C Both reactions continue at equal rates D Only reverse reaction occurs

14

According to Le Chatelier’s principle, if stress is applied:

A Equilibrium stops B System shifts to reduce stress C System shifts to increase stress D Reaction completes

15

Which base is used in whitewashing?

A Calcium oxide B Calcium hydroxide C Sodium hydroxide D Potassium hydroxide

16

According to Bronsted–Lowry theory, a base is a:

A Proton donor B Proton acceptor C Neutron donor D Electron acceptor

17

Which symbol is used to represent a reversible reaction?

A → B ⇌ C = D +

18

Self-ionization of water produces:

A H⁺ and Cl⁻ B H⁺ and OH⁻ C Na⁺ and OH⁻ D H₂ and O₂

19

Which condition favors formation of more products in exothermic reaction?

A Increase temperature B Decrease temperature C Add catalyst D Increase pressure only

20

Increase in temperature favors:

A Endothermic reaction B Exothermic reaction C Reverse reaction always D No reaction

21

Which factor affects equilibrium in gaseous reactions only?

A Temperature B Pressure C Catalyst D Concentration

22

Which acid is used in fertilizers?

A Hydrochloric acid B Sulfuric acid C Nitric acid D Acetic acid

23

The law of mass action was proposed by:

A Arrhenius B Le Chatelier C Guldberg and Waage D Dalton

24

The study of chemical equilibrium helps in understanding:

A Atomic structure B Reaction yield C Isotopes D Radioactivity

25

Which type of reaction can establish equilibrium?

A Irreversible reaction B Reversible reaction C Neutralization reaction D Combustion reaction

26

Pressure has no effect on equilibrium when:

A Reaction is slow B Only solids are involved C Equal moles of gas are present D Catalyst is added

27

Increase in concentration of reactants shifts equilibrium toward:

A Left B Right C No change D Completion

28

If the equilibrium constant is very small, the reaction favors:

A Products B Reactants C Both equally D Completion

29

Which reaction is endothermic?

A Heat is released B Heat is absorbed C No heat change D Always reversible

30

Which salt is formed by strong acid and strong base?

A Acidic salt B Basic salt C Neutral salt D Complex salt

Chem – Chapter 9: Chemical Equilibrium + Chapter 10: Acids, Bases and Salts