Here are 20 multiple-choice questions (MCQs) from the chapter "Acids, Bases, and Salts" (Class 10 Science):
1. What is the nature of aqueous solutions of acids?
a) Neutral
b) Basic
c) Acidic
d) Amphoteric
2. Which ion is responsible for the acidic nature of a solution?
a) OH⁻
b) H⁺
c) Na⁺
d) Cl⁻
3. What is the chemical formula of baking soda?
a) Na₂CO₃
b) NaHCO₃
c) NaOH
d) NH₄OH
4. Which of the following is an organic acid?
a) Hydrochloric acid
b) Sulfuric acid
c) Acetic acid
d) Nitric acid
5. The pH of a neutral solution is:
a) 0
b) 7
c) 14
d) 5
6. Which of the following is a strong base?
a) NH₄OH
b) NaOH
c) CH₃COOH
d) H₂CO₃
7. What is the color of methyl orange in an acidic solution?
a) Yellow
b) Blue
c) Red
d) Green
8. What happens when an acid reacts with a metal?
a) Salt and oxygen gas are formed
b) Salt and hydrogen gas are formed
c) Salt and water are formed
d) Only salt is formed
9. Which of the following will turn red litmus blue?
a) HCl
b) NaOH
c) H₂SO₄
d) CO₂
10. What is the pH of a strong acid like hydrochloric acid?
a) Less than 7
b) Equal to 7
c) More than 7
d) Exactly 14
11. What is the chemical formula of washing soda?
a) NaHCO₃
b) Na₂CO₃
c) NaCl
d) Ca(OH)₂
12. Which acid is found in lemon juice?
a) Citric acid
b) Acetic acid
c) Formic acid
d) Oxalic acid
13. Which gas is evolved when an acid reacts with a metal carbonate?
a) Hydrogen
b) Oxygen
c) Carbon dioxide
d) Nitrogen
14. What is the chemical name of common salt?
a) Sodium hydroxide
b) Sodium chloride
c) Sodium carbonate
d) Sodium bicarbonate
15. Which of the following acids is used in car batteries?
a) Hydrochloric acid
b) Sulfuric acid
c) Nitric acid
d) Acetic acid
16. What is the pH range of acids?
a) 0 to 7
b) 7 to 14
c) 0 to 14
d) Only 7
17. A base which is soluble in water is called:
a) Salt
b) Acid
c) Alkali
d) Oxide
18. Which of the following is an example of a neutral salt?
a) NaCl
b) Na₂CO₃
c) NaHCO₃
d) NH₄Cl
19. Which acid is present in vinegar?
a) Acetic acid
b) Citric acid
c) Lactic acid
d) Formic acid
20. Plaster of Paris (POP) is chemically:
a) CaSO₄·2H₂O
b) CaSO₄·½H₂O
c) CaCO₃
d) Na₂CO₃
Let me know if you need answers or explanations!
No comments:
Post a Comment