Home PYQs UPPSC UPPSC MCQs Prelims 2022 (GS Paper I)

Question

Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R).

Assertion (A): A solution of table salt in a glass of water is homogeneous.
Reason (R): A solution having different composition throughout is homogeneous.

Select the correct answer from the code given below:
Code:

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

Answer:

Option B: (A) is true but (R) is false

Detailed Solution:

The correct answer is “(A) is true but (R) is false”.

Assertion (A) is true: A solution of table salt (sodium chloride) in water is homogeneous because the salt completely dissolves in the water, resulting in a uniform mixture.

Reason (R) is false: A homogeneous solution has a uniform composition throughout, while a solution with different compositions throughout would be classified as heterogeneous.

Therefore, the reasoning does not correctly explain the assertion.