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ICSE Class 10 Chemistry Question 2 of 23

Solved 2024 Specimen Paper ICSE Class 10 Chemistry — Question 2

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2
Question

Question 1(ii)

A compound P is heated in a test tube with sodium hydroxide solution. A red litmus paper held at the mouth of the test tube turns blue. Which of the following could compound P be?

  1. zinc sulphate
  2. copper sulphate
  3. ferrous sulphate
  4. ammonium sulphate
Answer

ammonium sulphate

Reason — Ammonium sulphate reacts with sodium hydroxide to produce sodium sulphate, ammonia gas, and water. The red litmus turns blue due to the basic ammonia gas.