Compound X & Y give effervesce with Na2CO3 solution, X gives a silver mirror with ammonical AgNO3 while Y gives sweet smell compound on heating with alcohol X & Y are
Correct answer: A. Formic acid & acetic acid
- A. Formic acid & acetic acid
- B. Acetic acid & acetic acid
- C. Acetone & formic acid
- D. Acetic acid & acetone
Explanation
Formic acid contains both a carboxyl group and an aldehyde group, which allows it to react with Na2CO3 to produce effervescence and with ammonical AgNO3 to produce a silver mirror. Acetic acid, on the other hand, forms sweet-smelling esters when heated with alcohol, which fits the description for compound Y. Thus, X must be formic acid and Y must be acetic acid.Options B, C, and D are incorrect because acetone does not produce effervescence with Na2CO3, and acetic acid does not produce a silver mirror with ammonical AgNO3.
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About Reactivity of Carboxylic Acids
Carboxylic acids show acidic behaviour because their carboxylate ions are resonance-stabilised, and electron-withdrawing groups can change their strength. Reactions include neutralisation, esterification, formation of acid chlorides and amides, reduction, decarboxylation and substitution at the acyl carbon, which differs from the reactions of phenols.
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