1.

Which one of the following nitro compounds when reacted with nitrous acid followed by treatment with alkali produces blue colour

Answer»

2-methyl-2-nitropropane
2-methyl-1-nitropropane
2-nitropropane
NITROBENZENE

Solution :Nitro group attached to secondary carbon atom will give pseudo nitrol with `HNO_(2)` which on further treatment with alkali gives blue colour
`UNDERSET(CH_(3))underset(|)overset(CH_(3))overset(|)(HC)-NO_(2)overset(HONO)rarrH_(3)C-underset(NO)underset(|)overset(CH_(3))overset(|)(C)-NO_(2)overset(NaOH)rarr` Blue Colour


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