A colourless water soluble organic liqu...

A colourless water soluble organic liquid decomposes sodium carbonate and liberates carbon dioxide. It produces black precipitate with Tollen's reagent. The liquid is `:`

acetaldehyde

acetic acid

formaldehyde

formic acid

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The correct Answer is:

`underset("Formic acid")(H-overset(O)overset(||)(C)-OH)overset(Na_(2)CO_(3))(rarr)H-overset(O)overset(||)(C)-ONa+CO_(2)uarr`
`H-overset(O)overset(||)(C)-OHunderset(AgNO_(3))overset("Ammonical")(rarr)Agdarr`,Silver Mrror

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