Compounds X and Y give effervescence with $N a_{2} C O_{3}$ solution. X gives a white precipitate with ammonical $A g N O_{3}$ while Y has given a sweet-smelling compound on heating with alcohol. X and Y are:

H C O O H a n d C H_{3} C O O H

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C H_{3} C H O a n d C H_{3} C O O H

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C H_{3} C O O H a n d C H_{3} C O C H_{3}

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C H_{3} C O C H_{3} a n d H C O O H

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Solution

The correct option is A $H C O O H a n d C H_{3} C O O H$
A
X and Y give effervescence with $N a_{2} C O_{3}$ implies that they are acids. Further methanoic acid is the only acid that gives white precipitate with $A g N O_{3}$ solution and acetic acid reacts with alcohol to form a sweet smelling ester.

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