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Question

Which of the following organic compounds will not yield CO2 when treated with Na2CO3 solution?

A
Benzoic acid
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B
Phenol
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C
Sulphanilic acid
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D
p-Nitrophenol
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Solution

The correct option is B Phenol
Phenol is least acidic among all, and will not react with Na2CO3 to liberate CO2. However presence of NO2 group at para position increases the acidity in p-nitrophenol and thus it gives bicarbonate test.

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