1.

The increasing order of the rate of HCN addition of compound a-d is (i) HCHO (ii) CH_(3)COCH_(3) (iii) PhCOCH_(3) (iv) PhCOPh

Answer»

`IV LT ii lt iii lt i`
`iv lt iii lt ii lt i`
`iii lt iv lt ii lt i`
`ILT ii lt iii lt iv`.

ANSWER :B


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