Question

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: Metallic sodium dissolved in liquid ammonia giving a deep blue solution which is paramagnetic.
Reasons R: The deep blue solution to the formation of amide.
In the light of the above statements, the correct answer from the options below:

• A. Both A and R are true but R is the correct explanation of A.
• B. A is true but R is false.
• C. A is false but R is true.
• D. Both A and R are true and R is the correct explanation of A.

Answer 1

The Correct Option is B

To solve this problem, we need to evaluate both the assertion and the reason:

Assertion A: Metallic sodium dissolved in liquid ammonia gives a deep blue solution which is paramagnetic.

This statement is true. When metallic sodium is dissolved in liquid ammonia, it forms solvated electrons which impart a deep blue color to the solution. These solvated electrons are unpaired and therefore the solution is paramagnetic.

Reason R: The deep blue solution is due to the formation of amide.

This statement is false. The deep blue color is not due to the formation of amide. The color and paramagnetism are due to the presence of solvated (unpaired) electrons, not amide ions.

Therefore, based on the analysis above, the correct conclusion is:

A is true but R is false.