Acids, Bases and Salts Class 10 MCQs with Explanations
Acids, Bases and Salts – Class 10 MCQs with Explanations
Class: 10 | Subject: Science
Section: Chemistry
Based on: NCERT Syllabus | CBSE Board Examinations
1. Which of the following is an acid?
Answer: B
HCl releases H⁺ ions in aqueous solution, showing acidic nature.
HCl releases H⁺ ions in aqueous solution, showing acidic nature.
2. Bases that dissolve in water are called:
Answer: A
Water‑soluble bases are known as alkalis.
Water‑soluble bases are known as alkalis.
3. pH value of a neutral solution is:
Answer: B
Neutral solutions like pure water have pH 7.
Neutral solutions like pure water have pH 7.
4. Which turns blue litmus red?
Answer: C
Acids change blue litmus to red due to H⁺ ions.
Acids change blue litmus to red due to H⁺ ions.
5. NaOH is a:
Answer: B
Sodium hydroxide releases OH⁻ ions.
Sodium hydroxide releases OH⁻ ions.
6. Tooth decay starts when pH falls below:
Answer: B
Low pH causes enamel corrosion.
Low pH causes enamel corrosion.
7. Acid + Base → ?
Answer: A
Neutralization reaction forms salt and water.
Neutralization reaction forms salt and water.
8. Phenolphthalein in base becomes:
Answer: B
Indicator turns pink in alkaline medium.
Indicator turns pink in alkaline medium.
9. Universal indicator shows:
Answer: B
It indicates strength of acid/base.
It indicates strength of acid/base.
10. HCl in water forms:
Answer: C
It ionizes into H⁺ and Cl⁻.
It ionizes into H⁺ and Cl⁻.
11. Baking soda formula:
Answer: B
Used in baking and antacids.
Used in baking and antacids.
12. Washing soda formula:
Answer: A
Hydrated sodium carbonate.
Hydrated sodium carbonate.
13. Plaster of Paris formula:
Answer: A
Prepared by heating gypsum.
Prepared by heating gypsum.
14. Strong acid example:
Answer: A
Completely ionizes in water.
Completely ionizes in water.
15. Antacids neutralize:
Answer: C
They reduce stomach acidity.
They reduce stomach acidity.
16. Lime water turns milky with:
Answer: B
CaCO₃ precipitate forms.
CaCO₃ precipitate forms.
17. Acid rain contains:
Answer: A
Formed from SO₂ & NO₂ pollution.
Formed from SO₂ & NO₂ pollution.
18. pH of strong base:
Answer: C
Basic solutions have pH above 7.
Basic solutions have pH above 7.
19. Salt formed from strong acid & strong base is:
Answer: C
Example: NaCl.
Example: NaCl.
20. Common salt chemical name:
Answer: B
NaCl is obtained from seawater.
NaCl is obtained from seawater.