CBSE Class 10 - Science - CH2 - Acids, Bases and Salts (MCQs)

Acids, Bases and Salts

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MCQs

Q1: The most commonly used indicator in laboratory is
(a) Methyl Orange
(b) Litmus
(c) Phenolphtalein
(d) Universal Indicator

Q2: Which gas is released when a metal reacts with an acid?

(a) Cl₂

(b) O₂
(c) H₂
(d) SO₂


Q3: The strength of acid depends upon

(a) density of the acid
(b) oxygen atoms present
(c) number of hydrogen atoms present in the molecule
(d) concentration of H+ ions furnished by the acid


Q4: Which statement is incorrect?

(a) Acids have pH more than 7
(b) Acids give H⁺ ions in water
(c) Acid conduct electricity in aqueous solution
(d) Acids turn blue litmus red.


Q5: Which of the following substance is antacid?
(a) NaCl
(b) Mg(OH)₂
(c) HCl

(d) H₂SO₄

Q6: Which of the following is strong acid?

(a) Acetic acid

(b) Nitric acid

(c) Citric acid

(d) Oxalic acid

Q7: Who proposed ionic theory of acid and bases

(a) Arrhenius

(b) Bronsted

(c) Lewis

(d) Lowry

Q8:  Acid present in bee sting?

(a) Methanoic acid 

(b) Hydrochloric acid 

(c) Acetic acid 

(d) Sulphuric acid

Q9: HCl reacts with NaOH to form salt and water, this reaction is called 

(a) Precipitation reaction 

(b) Neutralization 

(c) Redox reaction 

(d) Combination reaction

Q10: Which of the following solutions is the most basic?

(a) pH = 8.2

(b) pH = 9.3

(c) pH = 11.2

(d) pH = 10.5

Answers:
1: (d) Universal Indicator
2: (c) H₂
3: (d) concentration of H⁺ ions furnished by the acid
4: (a) Acids have pH more than 7
5: (b) Mg(OH)₂

6: (b) Nitric acid

7: (a) Arrhenius

8: (a) Methanoic acid (also called Formic acid)

9: (b) Neutralization

10: (c) pH = 11.2