1.

One among the following pairs of compounds are not isomers?

Answer»

`(CH_(3))_(2)CH- O-C_(2)H_(5) and CH_(3) (CH_(2))_(2) - O-C_(2)H_(5)`
`CH_(3)CH_(2)CO_(2)H and CH_(3)CO_(2)CH_(3)`
`CH_(3)COCH_(3) and CH_(3)CH_(2)CH_(2)OH`
`CH_(3)CH_(2)NO_(2) and NH_(2)CH_(2)COOH`

ANSWER :C


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