20 MCQs (without answers) based on the topic Indicators, Acids, Bases and Salts from Class 10 Science (Chapter: Acids, Bases and Salts – CBSE):
🧪 MCQs: Indicators, Acids, Bases and Salts (No Answers)
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Which of the following turns red litmus blue?
A. Vinegar
B. Lemon juice
C. Soap solution
D. Orange juice -
Phenolphthalein gives which colour in basic solution?
A. Red
B. Colourless
C. Pink
D. Blue -
Which of the following is a natural indicator?
A. Methyl orange
B. Phenolphthalein
C. Litmus
D. All of the above -
Turmeric turns _______ in basic solution.
A. Red
B. Yellow
C. Blue
D. Orange -
Which of the following is used to detect acids and bases?
A. Salt
B. Indicator
C. Metal
D. Water -
Which acid is present in lemon?
A. Acetic acid
B. Citric acid
C. Formic acid
D. Oxalic acid -
What is the chemical formula of baking soda?
A. NaCl
B. Na₂CO₃
C. NaHCO₃
D. CaCO₃ -
Which gas is evolved when acid reacts with metal carbonates?
A. Oxygen
B. Carbon dioxide
C. Hydrogen
D. Nitrogen -
Which of the following is an acidic salt?
A. Na₂CO₃
B. NaCl
C. NH₄Cl
D. KNO₃ -
Which of the following salts is used in toothpaste?
A. Sodium chloride
B. Sodium bicarbonate
C. Calcium carbonate
D. Potassium nitrate -
What is the colour of methyl orange in acid?
A. Red
B. Yellow
C. Blue
D. Pink -
Which of the following acids is used in car batteries?
A. Hydrochloric acid
B. Nitric acid
C. Sulphuric acid
D. Acetic acid -
What is formed when acid reacts with base?
A. Salt
B. Water
C. Salt and water
D. None of these -
Which among the following is a strong base?
A. NaOH
B. NH₄OH
C. Ca(OH)₂
D. Mg(OH)₂ -
Which of the following will show pH less than 7?
A. Soap solution
B. Lemon juice
C. Baking soda
D. Toothpaste -
Which of the following is used to make antacid tablets?
A. Hydrochloric acid
B. Sodium hydroxide
C. Magnesium hydroxide
D. Sodium chloride -
Common salt is obtained from seawater by the process of:
A. Filtration
B. Sedimentation
C. Crystallization
D. Evaporation -
The salt formed by strong acid and strong base is:
A. Acidic
B. Basic
C. Neutral
D. Depends on the conditions -
Which of these is a weak acid?
A. HCl
B. H₂SO₄
C. CH₃COOH
D. HNO₃ -
Which salt is used for making bleaching powder?
A. Sodium chloride
B. Potassium chloride
C. Calcium chloride
D. Ammonium chloride
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✅ Answer Key
1. C. Soap solution
2. C. Pink
3. C. Litmus
4. A. Red
5. B. Indicator
6. B. Citric acid
7. C. NaHCO₃
8. B. Carbon dioxide
9. C. NH₄Cl
10. C. Calcium carbonate
11. A. Red
12. C. Sulphuric acid
13. C. Salt and water
14. A. NaOH
15. B. Lemon juice
16. C. Magnesium hydroxide
17. D. Evaporation
18. C. Neutral
19. C. CH₃COOH
20. A. Sodium chloride
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