Question

In the following question, two statements are given -- one labelled Assertion (A) and the other labelled Reason (R). 1

Assertion: Ammonium chloride changes its state when heated.

Reason: Ammonium chloride undergoes sublimation.

Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below:

• A. Both A and Rare true and R is correct explanation of the assertion.
• B. Both A and R are true but R is not the correct explanation of the assertion.
• C. A is true but R is false.
• D. A is false but R is true.

Answer 1

The correct option is A

Both A and Rare true and R is correct explanation of the assertion.

Explanation for assertion statement: When ammonium chloride is heated, it dissociates into NH₃ and HCl, among other products.

When heated, ammonium chloride sublimates, changing from a solid to a gas. Ammonia and hydrogen chloride are among the components found in the gas.

Explanation for reason statement: Ammonium chloride undergoes sublimation when it is heated, the substance changes from solid to gas.

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

Therefore, option (a) is the correct answer.