How will you convert ethanal into the following compounds ?
i. Butane-1,3-diol , ii. But-2-enal
iii. But-2-enoic acid

Explanation

`2CH_(3)CHOoverset("Dil NaOH")rarrunderset("3-Hydroxy butanal")(CH_(3)CH(OH)CH_(2)CHO)overset(NaBH_(4))rarrunderset("Butan-1,3-diol")(CH_(3)CHOHCH_(2)OH`
`2CH_(3)CHOoverset("Dil NaOH")rarrCH_(3)CH(OH)CH_(2)CHoverset(H_(3)O^(+))underset(-H_(2)O)rarrCH_(3)-underset("But -2- enal")(CH=CH)-CHO`
`underset("Ethanal")(CH_(3)CHO)overset("(i)Dil NaOH")underset("(ii) H"_(2)O^(+))rarrCH_(3)CH=CHCHOoverset([Ag(NH_(3))_(2)]^(+)OH^(-))underset("Tollens'reagent")rarrunderset("But - 2 - enoic acid")(CH_(3)CH=CHCO_(2)H`