Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: Alcohols react both as nucleophiles and electrophiles.
Reason R: Alcohols react with active metals such as sodium, potassium and aluminum to yield corresponding alkoxides and liberate hydrogen.
In the light of the above statements, choose the correct answer from the options given below:
Assertion A: Alcohols react both as nucleophiles and electrophiles.
Reason R: Alcohols react with active metals such as sodium, potassium and aluminum to yield corresponding alkoxides and liberate hydrogen.
In the light of the above statements, choose the correct answer from the options given below:
- (A)A is false but R is true.
- (B)A is true but R is false.
- (C)Both A and R are true and R is the correct explanation of A .
- (D)Both A and R are true but R is NOT the correct explanation of A✓ Correct
Answer: (D)
Solution
Assertion: Alcohols act as nucleophiles (through the lone pairs on oxygen, e.g. in esterification or reactions) and as electrophiles (at carbon, e.g. when the is protonated and leaves). This is correct.
Reason: Alcohols do react with active metals such as Na, K and Al to liberate and form alkoxides -- also a correct statement, but it explains only the acidic (O-H bond) behaviour of alcohols towards metals, not their nucleophilic/electrophilic duality at carbon and oxygen described in the Assertion.
So both A and R are true, but R is not the correct explanation of A.
Reason: Alcohols do react with active metals such as Na, K and Al to liberate and form alkoxides -- also a correct statement, but it explains only the acidic (O-H bond) behaviour of alcohols towards metals, not their nucleophilic/electrophilic duality at carbon and oxygen described in the Assertion.
So both A and R are true, but R is not the correct explanation of A.
JEE Main · 2024 · 31 Jan 2024 · Shift 1 · Single correct option