1.

R-CH_2-CH_2OH can be converted into RCH_2CH_2COOH. The correct sequence of reagent is

Answer»

`PBr_3 , KCN , H^+`
`PBr_3, KCN , H_2`
`KCN , H^+`
`HCN , PBr_3, H^+`

SOLUTION :`RCH_2CH_2OH OVERSET(PBr_2)to RCH_2CH_2Broverset(KCN)to RCH_2CH_2CN overset(H^+)to RCH_2CH_2COOH`


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