Acids, Bases and Salts Class 10 MCQ with Answers Set-4
31. Which 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-
32. The chemical formula of baking soda is
A. Na2Co3
B. Na2Co3.10H2O
C. NaHCO3
D. NaOH
Answer –C. NaHCO3
Explanation-
33.Sodium carbonate is a basic salt because it is a salt of a
A. strong acid and strong base
B. weak acid and weak base
C. strong acid and weak base
D. weak acid and strong base
Answer –D. weak acid and strong base
Explanation-
34. Which of the following phenomena occurs, when a small amount of acid is added to water?
A. ionization
B. Neutralization
C. Acid Formation
D. Salt formation
Answer –A. ionization
Explanation-
35. To protect tooth decay, we are advised to brush our teeth regularly. The nature of the tooth paste commonly used is
A. acidic
B. neutral
C. basic
D. corrosive
Answer –C. basic
Explanation-
36. Alkalis are
A. acids, which are soluble in water
B. acids, which are insoluble in water
C. bases, which are insoluble in water
D. bases, which are soluble in water
Answer –D. bases, which are soluble in water
Explanation-
37. Salt form during reaction of sulphuric acid with copper
A. Na2SO4
B. CuSO4
C. K2SO4
D. NH4CI
Answer –B. CuSO4
Explanation-
38. Na2CO3.10H2O is known as –
A. Baking soda
B. Baking powder
C. Washing soda
D. Bleaching powder
Answer –C. Washing soda
Explanation-
39.Which of the following substance will not give carbon dioxide on treatment with dilute acid?
A. Marble
B. Limestone
C. Baking soda
D. Lime
Answer –D. Lime
Explanation-
40. Which of the following statements is correct about an aqueous solution of an acid and of a base?
a. Higher the pH, stronger the acid
b. Higher the pH, weaker the acid
c. Lower the pH, stronger the base
d. Lower the pH, weaker the base
A. (a) and (c)
B. (b) and (c)
C. (a) and (d)
D. (b) and (d)
Answer –D. (b) and (d)
Explanation-
