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Chemistry
Assertion: p-chlorobenzoic acid is stronger acid than benzoic acid. Reason: Chlorine has electron donating resonance (+ R ) effect.
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Q.
Assertion
: $p$-chlorobenzoic acid is stronger acid than benzoic acid.
Reason
: Chlorine has electron donating resonance $(+ R )$ effect.
AIIMS
AIIMS 2013
The p-Block Elements - Part2
A
Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
B
Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C
Assertion is true but Reason is false.
D
Both Assertion and Reason are false.
Solution:
Chlorine has electron donating resonance effect however its inductive effect $(-I)$ wins over resonance effect and makes it overall electron withdrawing due to which increases the acid strength of benzoic acid.