1.

R-CH_(2)-CH_(2)OH can be converted into RCH_(2)CH_(2)COOH. The correct sequence of reagents is

Answer»

`PB r_(3),KCN,H^(+)`<BR>`PBr_(3),KCN,H_(2)`
`KCN,H^(+)`
`KCN,PB r_(3),H^(+)`

Solution :`RCH_(2)CH_(2)OH overset(PBr_(3))toRCH_(2)CH_(2)Br overset(KCN)to RCH_(2)CH_(2)CN overset(H^(+))to RH_(2)CH_(2)COOH`


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