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Answers
Answer:
12. Alkalis are
(a) acids, which are soluble in water
(b) acids, which are insoluble in water
By Kantaraj G S, GJC Anaveri, Bhadravathi taluk
Collection of MCQ for Class 10 Science
(c) bases, which are insoluble in water
(d) bases, which are soluble in water
Answer
Answer: d
13. Which of the following statements is correct about an aqueous solution of an acid and of a base?
(i) Higher the pH, stronger the acid
(ii) Higher the pH, weaker the acid
(in) Lower the pH, stronger the base
(iv) Lower the pH, weaker the base
(a) (i) and (iii)
(b) (ii) and (iii)
(c) (i) and (iv)
(d) (ii) and (iv)
Answer/ Explanation
Answer: d
Explaination: Reason: Stronger the acid, lesser is the pH. Stronger the base, higher is the pH.
14. The apparatus given in the adjoining figure was set up to demonstrate electrical conductivity.
Which of the following statement(s) is (are) correct?
(i) Bulb will not glow because electrolyte is not acidic.
(ii) Bulb will glow because HCl is a strong acid and furnishes ions for conduction.
(iii) Bulb will not glow because circuit is incomplete.
(iv) Bulb will not glow because it depends upon the type of electrolytic solution.
(a) (i) and (iii)
(b) (ii) and (iv)
(c) (ii) only
(d) (iv) only
By Kantaraj
Explanation:
12. Alkalis are
(a) acids, which are soluble in water
(b) acids, which are insoluble in water
By Kantaraj G S, GJC Anaveri, Bhadravathi taluk
Collection of MCQ for Class 10 Science
(c) bases, which are insoluble in water
(d) bases, which are soluble in water
Answer
Answer: d
13. Which of the following statements is correct about an aqueous solution of an acid and of a base?
(i) Higher the pH, stronger the acid
(ii) Higher the pH, weaker the acid
(in) Lower the pH, stronger the base
(iv) Lower the pH, weaker the base
(a) (i) and (iii)
(b) (ii) and (iii)
(c) (i) and (iv)
(d) (ii) and (iv)
Answer/ Explanation
Answer: d
Explaination: Reason: Stronger the acid, lesser is the pH. Stronger the base, higher is the pH.
14. The apparatus given in the adjoining figure was set up to demonstrate electrical conductivity.
Which of the following statement(s) is (are) correct?
(i) Bulb will not glow because electrolyte is not acidic.
(ii) Bulb will glow because HCl is a strong acid and furnishes ions for conduction.
(iii) Bulb will not glow because circuit is incomplete.
(iv) Bulb will not glow because it depends upon the type of electrolytic solution.
(a) (i) and (iii)
(b) (ii) and (iv)
(c) (ii) only
(d) (iv) only
By Kantaraj