By which of the following sequence of steps can the alcohol `RCH_(2)CH_(2)OH(X)` be converted into `RCH_(2)CH_(2)COOH(Y)` ?A. `X overset(HCN)rarr overset(PBr)rarr overset(H_(2)O^(+))rarrY`B. `X overset(KCN)rarr overset(H_(3)O^(+))rarrY`C. `X overset(PBr)rarr overset(KCN)rarr overset(H_(3)O^(+))rarrY`D. `X overset(PBr)rarr overset(KCN)rarroverset(H_(2)//Pt)rarrY`

By which of the following sequence of steps can the alcohol `RCH_(2)CH

1.	By which of the following sequence of steps can the alcohol `RCH_(2)CH_(2)OH(X)` be converted into `RCH_(2)CH_(2)COOH(Y)` ?A. `X overset(HCN)rarr overset(PBr)rarr overset(H_(2)O^(+))rarrY`B. `X overset(KCN)rarr overset(H_(3)O^(+))rarrY`C. `X overset(PBr)rarr overset(KCN)rarr overset(H_(3)O^(+))rarrY`D. `X overset(PBr)rarr overset(KCN)rarroverset(H_(2)//Pt)rarrY`
Answer» Correct Answer - C Increase in the number of carbon atoms is possible by means of cyanide method via halides.Hydrolsis of cyanide yields the corresponding carboxylic acid `Runderset((X))(CH_(2))OHoverset(PBr_(3))rarrRCH_(2)CH_(2)Br overset(KCN)rarr` `RCH_(2)CH_(2)CNoverset(H_(3)O^(+))rarrRunderset((Y))(CH_(2))COOH`

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