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ICSE Class 10 Chemistry Question 10 of 62

Study of Compounds — Sulphuric Acid — Question 16

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Question

Question 16

Assertion (A): Sulphuric acid when dissolved in water forms a basic salt

Reason (R): Sulphuric acid ionises in two stages, it is a dibasic acid.

  1. Both A and R are true and R is the correct explanation of A.
  2. Both A and R are true but R is not the correct explanation of A.
  3. A is true but R is false.
  4. A is false but R is true.
Answer

A is false but R is true.

Explanation— Sulphuric acid when dissolved in water forms hydronium ion and shows acidic properties. Hence, the assertion (A) is false.

Sulphuric acid ionises in two stages and is called dibasic acid. Hence, the reason (R) is true.

H2SO4 + 2H2O ⇌\rightleftharpoons H3O+ + HSO4-

HSO4- + 2H2O ⇌\rightleftharpoons H3O+ + SO42-