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ICSE Class 10 Chemistry Question 16 of 53

Study of Compounds — Hydrogen Chloride — Question 8

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Question

Question 8

Assertion (A): HCl gas fumes in moist air.

Reason (R): HCl gas is highly soluble.

  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

Both A and R are true and R is the correct explanation of A.

Explanation— Hydrogen chloride (HCl) gas fumes in moist air because it is highly soluble in water. In the presence of moisture, HCl gas dissolves in water vapour in the air to form tiny droplets of hydrochloric acid, which appear as white fumes. So, both the assertion and the reason are true, and the reason correctly explains the assertion.