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Q.

(A) Carboxylic acids contain a carbonyl group but do not give characteristic reactions of the carbonyl group. 
(R) Double bond character of C = O bond in carboxylic acids is greatly reduced due to resonance, as compared to that in aldehydes and ketones

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a

Both (A) and (R) are true and (R) is the correct explanation of (A)

b

Both (A) and (R) are true but (R) is not the correct explanation of (A)

c

(A) is true but (R) is false

d

Both (A) and (R) are false

answer is A.

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Detailed Solution

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Carboxylic acids do not give characteristic reaction of carbonyl group. This is because the lone pairs on oxygen atom attached to hydrogen atom in the -COOH group are involved in resonance thereby making the carbon atom less electrophilic. Hence, carboxylic acids do not give characteristic reaction of carbonyl group.

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