Acids, Bases and Salts Class 10 MCQ with Answers Set-2
11. Which one of the following salts does not contain water of crystallisation?
A. Blue vitriol
B. Baking soda
C. Washing soda
D. Gypsum
Answer –B. Baking soda
Explanation-
12. pH value less than 7 indicates that the solution is –
A. Acidic
B. Basic
C. Neutral
D. No effect
Answer –A. Acidic
Explanation-
13. Sodium carbonate reacts with hydrochloric acid and produces –
A. NaCl
B. CO2
C. H2O
D. All of the above
Answer –D. All of the above
Explanation-
14. In terms of acidic strength, which one of the following is in the correct increasing order?
A. Water < Acetic acid < Hydrochloric acid
B. Water < Hydrochloric acid < Acetic acid
C. Acetic acid < Water < Hydrochloric acid
D. Hydrochloric acid < Water < Acetic acid
Answer –A. Water < Acetic acid < Hydrochloric acid
Explanation-
15. What is formed when zinc reacts with sodium hydroxide?
A. Zinc hydroxide and sodium
B. Sodium zincate and hydrogen gas
C. Sodium zinc-oxide and hydrogen gas
D. Sodium zincate and water
Answer –B. Sodium zincate and hydrogen gas
Explanation-
16. An aqueous solution turns the red litmus solution blue. Excess addition of which of the following solutions would reverse the change?
A. Baking powder
B. Lime
C. Ammonium hydroxide solution
D. Hydrochloric acid
Answer –D. Hydrochloric acid
Explanation-
17. At what temperature is gypsum heated to form Plaster of Paris?
A. 35°C
B. 70°C
C. 80°C
D. 100°C
Answer –D. 100°C
Explanation-
18. Tomato is a natural source of which acid?
A. Acetic acid
B. Citric acid
C. Tartaric acid
D. Oxalic acid
Answer –D. Oxalic acid
Explanation-
19. Brine is an
A. aqueous solution of sodium hydroxide
B. aqueous solution of sodium carbonate
C. aqueous solution of sodium chloride
D. aqueous solution of sodium bicarbonate
Answer –C. aqueous solution of sodium chloride
Explanation-
20. Na2CO3 . 10H2O is
A. washing soda
B. baking soda
C. bleaching powder
D. tartaric acid
Answer –A. washing soda
Explanation-