Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: Metallic sodium dissolves in liquid ammonia giving a deep blue solution, which is paramagnetic.
Reason R: The deep blue solution is due to the formation of amide.
In the light of the above statements, choose the correct answer from the options given below:
- A
Both A and R are true but R is NOT 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.
Alkali metals dissolve in liquid ammonia to give intensely blue, paramagnetic solutions. The blue colour and paramagnetism come from ammoniated electrons (solvated electrons), not from amide formation, so the assertion is correct but the reason given is wrong.
Amide formation () occurs only on standing or in the presence of a catalyst.
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