Question:
Assertion (A): The carboxylic carbon is more electrophilic than carbonyl carbon.
Reason (R): All the bonds attached to carboxylic carbon lie in one plane.
Choose the correct option.
Assertion (A): The carboxylic carbon is more electrophilic than carbonyl carbon.
Reason (R): All the bonds attached to carboxylic carbon lie in one plane.
Choose the correct option.
Reason (R): All the bonds attached to carboxylic carbon lie in one plane.
Choose the correct option.
Show Hint
Electrophilicity of carboxylic carbon is reduced by resonance; planar geometry arises from sp\(^2\) hybridization.
Updated On: Jul 18, 2026
- Both A & R are true and R is correct explanation of A
- Both A & R are correct but R is not correct explanation of A
- A is correct, R is wrong
- A is wrong, R is correct
Show Solution
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The Correct Option is D
Solution and Explanation
Step 1: Compare electrophilicity.
Carboxylic carbon is less electrophilic than a simple carbonyl carbon due to resonance stabilization of –COOH. Lone pair delocalization reduces positive character on carbon.
Step 2: Analyze geometry.
All bonds attached to carboxylic carbon are in the same plane (sp\(^2\) hybridized), making the geometry planar. This statement is correct.
Step 3: Identify assertion correctness.
Since resonance reduces electrophilicity, the assertion that carboxylic carbon is more electrophilic than carbonyl carbon is incorrect.
Step 4: Identify reason correctness.
Planarity of carboxylic carbon is correct.
Step 5: Correlation of A & R.
R is true but it does not explain A.
Step 6: Final conclusion.
\[ \boxed{\text{Option (4)}} \]
Carboxylic carbon is less electrophilic than a simple carbonyl carbon due to resonance stabilization of –COOH. Lone pair delocalization reduces positive character on carbon.
Step 2: Analyze geometry.
All bonds attached to carboxylic carbon are in the same plane (sp\(^2\) hybridized), making the geometry planar. This statement is correct.
Step 3: Identify assertion correctness.
Since resonance reduces electrophilicity, the assertion that carboxylic carbon is more electrophilic than carbonyl carbon is incorrect.
Step 4: Identify reason correctness.
Planarity of carboxylic carbon is correct.
Step 5: Correlation of A & R.
R is true but it does not explain A.
Step 6: Final conclusion.
\[ \boxed{\text{Option (4)}} \]
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