Q.

Which of the following gives positive 2, 4 – DNP test and a yellow ppt with NaOH + I2 but does not give precipitate with [Ag(NH3)2]+

Moderate

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CH3CH2CHO

CH3CHO

CH3COCH3

CH3CH2COCH2CH3

answer is C.

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Detailed Solution

It gives positive 2, 4 – DNP test, because it is a carbonyl compound.It is a methyl Ketone. It gives yellow ppt of CHI3 with NaOH + I2.Ketones cannot reduce Tollen’s reagent.option 1……negative Iodoform test;option 2…..gives Tollen's test;option 4…. negative Iodoform test;

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