1.

An organic compound X is oxidised by using acidified K_(2)Cr_(2)O_(7). The product obtained reacts with phenyl hydrazine but does not answer silver mirror test. The possible structure of X is

Answer»

`CH_(3)COCH_(3)`
`(CH_(3))_(2)CHOH`
`CH_(3)CHO`
`CH_(3)CH_(2)OH`

Solution :The OXIDATION product of X reacts with phenyl hydrazine, thus it contains
`gt C=0` group. The same product does not answer silver mirror test thus, it is a ketone, because only aldehydes GIVE this test.
Thus the compound X must be a `2^(@)` alcohol, as only SECONDARY alcohols give KETONES on oxidation and hence X is `CH_(3))_(2)CHOH`.


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