Extra 40 MCQ questions and answers from Chapter:2 Acids, Bases, and Salts for Class 10 CBSE Science:

 

Which of the following is an example of a strong acid?
a) Acetic acid
b) Hydrochloric acid
c) Citric acid
d) Carbonic acid

Answer: b) Hydrochloric acid

 

Which of the following is an example of a strong base?
a) Ammonium hydroxide
b) Calcium hydroxide
c) Sodium hydroxide
d) Magnesium hydroxide

Answer: c) Sodium hydroxide

 

What is the nature of lime water?
a) Acidic
b) Basic
c) Neutral
d) Amphoteric

Answer: b) Basic

 

Which of the following acids is present in vinegar?
a) Acetic acid
b) Formic acid
c) Oxalic acid
d) Hydrochloric acid

Answer: a) Acetic acid

 

Which of the following indicators is a natural indicator?
a) Phenolphthalein
b) Methyl orange
c) Litmus
d) Methyl red

Answer: c) Litmus

 

What is the colour of phenolphthalein in an acidic solution?
a) Pink
b) Colourless
c) Blue
d) Red

Answer: b) Colourless

 

What happens to the pH value when an acid is diluted?
a) Increases
b) Decreases
c) Remains the same
d) Becomes neutral

Answer: a) Increases

 

Which acid is present in lemon juice?
a) Hydrochloric acid
b) Sulfuric acid
c) Citric acid
d) Oxalic acid

Answer: c) Citric acid

 

Which of the following is an example of a neutral substance?
a) Lemon juice
b) Milk
c) Pure water
d) Vinegar

Answer: c) Pure water

 

Which base is used in the manufacture of soap?
a) NaCl
b) H₂SO₄
c) NaOH
d) CH₃COOH

Answer: c) NaOH

 

What is the pH of a neutral solution?
a) 0
b) 7
c) 10
d) 14

Answer: b) 7

 

A pH value less than 7 indicates a substance is:
a) Neutral
b) Acidic
c) Basic
d) Amphoteric

Answer: b) Acidic

 

A solution with pH greater than 7 is:
a) Acidic
b) Basic
c) Neutral
d) Amphoteric

Answer: b) Basic

 

Which of the following substances has a pH value less than 7?
a) Baking soda
b) Lemon juice
c) Milk of magnesia
d) Soap solution

Answer: b) Lemon juice

 

Which salt is formed when hydrochloric acid reacts with sodium hydroxide?
a) Sodium sulphate
b) Sodium chloride
c) Sodium carbonate
d) Ammonium chloride

Answer: b) Sodium chloride

 

Which gas is evolved when an acid reacts with a metal?
a) Oxygen
b) Hydrogen
c) Carbon dioxide
d) Nitrogen

Answer: b) Hydrogen

 

Which of the following salts is acidic in nature?
a) Sodium chloride
b) Sodium carbonate
c) Ammonium chloride
d) Potassium sulphate

Answer: c) Ammonium chloride

 

Which of the following salts is basic in nature?
a) Sodium carbonate
b) Sodium chloride
c) Ammonium chloride
d) Potassium nitrate

Answer: a) Sodium carbonate

 

Which of the following salts is neutral in nature?
a) Ammonium chloride
b) Sodium chloride
c) Sodium carbonate
d) Potassium hydroxide

Answer: b) Sodium chloride

 

What is the pH of gastric juice in the human stomach?
a) 1-2
b) 4-5
c) 6-7
d) 8-9

Answer: a) 1-2

 

Which gas is evolved when acids react with carbonates?
a) Oxygen
b) Carbon dioxide
c) Hydrogen
d) Nitrogen

Answer: b) Carbon dioxide

 

What happens when an acid is mixed with a base?
a) Neutralization
b) Displacement
c) Oxidation
d) Precipitation

Answer: a) Neutralization

 

Which acid is used in car batteries?
a) Hydrochloric acid
b) Sulfuric acid
c) Nitric acid
d) Acetic acid

Answer: b) Sulfuric acid

 

Which base is used as an antacid?
a) NaOH
b) KOH
c) Mg(OH)₂
d) Al(OH)₃

Answer: c) Mg(OH)₂

 

What is the chemical name of washing soda?
a) Sodium chloride
b) Sodium carbonate
c) Sodium bicarbonate
d) Calcium carbonate

Answer: b) Sodium carbonate

 

Which chemical is used in baking powder?
a) NaOH
b) NaHCO₃
c) HCl
d) H₂SO₄

Answer: b) NaHCO₃

 

Which salt is known as common salt?
a) Sodium carbonate
b) Sodium chloride
c) Sodium bicarbonate
d) Potassium chloride

Answer: b) Sodium chloride

 

Plaster of Paris (POP) is chemically known as:
a) CaSO₄.2H₂O
b) CaSO₄.½H₂O
c) CaCO₃
d) Na₂CO₃

Answer: b) CaSO₄.½H₂O

 

What is the pH of blood?
a) 4.5
b) 5.5
c) 7.4
d) 9.2

Answer: c) 7.4

 

Which substance is used to remove acidity from soil?
a) Lime
b) HCl
c) NaCl
d) KOH

Answer: a) Lime

 

Which base is found in household bleach?
a) NaOH
b) KOH
c) Ca(OH)₂
d) NH₄OH

Answer: a) NaOH

 

Which of the following acids is found in tomatoes?
a) Lactic acid
b) Oxalic acid
c) Acetic acid
d) Ascorbic acid

Answer: b) Oxalic acid

Which of the following bases is used in hair removal creams?
a) Sodium hydroxide
b) Calcium hydroxide
c) Ammonium hydroxide
d) Potassium hydroxide

Answer: c) Ammonium hydroxide

Which salt is formed when nitric acid reacts with calcium hydroxide?
a) Calcium nitrate
b) Calcium chloride
c) Calcium sulphate
d) Calcium carbonate

Answer: a) Calcium nitrate

Which substance is responsible for the sour taste in curd?
a) Tartaric acid
b) Lactic acid
c) Formic acid
d) Citric acid

Answer: b) Lactic acid