Question

2. For question numbers 1, 2 and 3, two statements are given- one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes (i), (ii), (iii) and (iv) as given below
i) Both assertion and reason are true and the reason is the correct explanation of the assertion.
ii) Both assertion and reason are true but the reason is not the correct explanation of the assertion.
iii) Assertion is true but the reason is false.
iv) Assertion is false but the reason is true.

1. Assertion: The mixture of ammonium chloride and sand is separated by sublimation.
Reason: Sand does not sublime, ammonium chloride sublimes.

2. Assertion: Alum is used in the purification of water.
Reason: Alum decreases the rate of sedimentation.

Answer 1

Explanation:

1. answer helps is I both are true

2. answer is option iii. assertion is true but reason is false