Acids, Bases and Salts Class 10 MCQs:
1. Alkalis are___________
(1) acids, which are soluble in water
(2) acids, which are insoluble in water
(3) bases, which are insoluble in water
(4) bases, which are soluble in water
Answer: 4
2. What happens when a solution of an acid is mixed with a solution of a base in a test tube?
1) Temperature of the solution increases
(2) Salt formation takes place
(d) Both (1) and (2)
(4) None of these
Answer: 3
3. Some fruits like mango, lemon, raw grapes, orange, etc., have a sour taste due to the presence of:
(1) Acetic acid
(2) Citric acid
(3) Lactic acid
(4) Oxalic acid
Answer: 2
4. What is the pH range of our body?
(1) 7.0 – 7.8
(2) 7.2 – 8.0
(3) 7.0 – 8.4
(4) 7.2 – 8.4
Answer: 1
5. Which one of the following salts does not con-tain water of crystallisation?
(1) Blue vitriol
(2) Baking soda
(3) Washing soda
(4) Gypsum
Answer: 2
6. The pH of acid rain________
(1) pH falls below 7
(2) pH falls below 6
(3) pH falls below 5.6
(4) pH is above 7
Answer: 3
7. In terms of acidic strength, which one of the following is in the correct increasing order?
(1) Water < Acetic acid < Hydrochloric acid
(2) Water < Hydrochloric acid < Acetic acid
(3) Acetic acid < Water < Hydrochloric acid
(4) Hydrochloric acid < Water < Acetic acid
Answer: 1
8. Sodium hydroxide is a__________
(1) weak base
(2) weak acid
(3) strong base
(4) strong acid
Answer: 3
9. pH value less than 7 indicates that the solution is________
(1) Acidic
(2) Basic
(3) Neutral
(4) No effect
Answer: 1
10. pH value more than 7 indicates that the solution is________
(1) Acidic
(2) Basic
(3) Neutral
(4) No effect
Answer: 2
11. pH value 7 indicates that the solution is________
(1) Acidic
(2) Basic
(3) Neutral
(4) No effect
Answer: 3
12. Which of the following are present in a dilute Aqueous solution of Hydrochloric Acid?
(1) H3O + Cl–
(2) H3O + OH–
(3) Cl– + OH–
(4) Unionised HCl
Answer: 1
13. What is the chemical formula of POP (Plaster of Paris)?
(1) CaSO4.2H2O
(2) CaSO4.3H2O
(3) CaSO4.1/2H2O
(4) CaCO3.1/2H2
Answer: 3
14. Which Acid is present in Tamarind?
(1) Tartaric acid
(2) Oxalic Acid
(3) Lactic Acid
(4) Citric Acid
Answer: 1
15. Bleaching powder is used as a disinfectant for water to:
(1) Make water tastier
(2) Remove all the dirt from water
(3) Make water germ-free
(4) Make water clear
Answer: 3