$CH_3CH=CHCHO$ is oxidized to $CH_3CH=CHCOOH$ using

Which of the following methods can be used to oxidize $Butan-2-one$ to $Propionic \ acid$?

For the given reaction,find the sum of $x + y = ?$
$CH_3-CH_2-CO-CH_3 \xrightarrow[(ii) \ y \ mol \ NaNH_2]{(i) \ x \ mol \ PCl_5} CH_3-C \equiv C-CH_3$

Three molecules of acetone in the presence of dry $HCl$ form:

Cyanohydrin of which compound on hydrolysis will give lactic acid?

Match the compounds given in List-$I$ with List-$II$ and select the suitable option using the code given below.

List-$I$	List-$II$
$A$. Benzaldehyde	$i$. Phenolphthalein
$B$. Phthalic anhydride	$ii$. Benzoin condensation
$C$. Phenyl benzoate	$iii$. Oil of wintergreen
$D$. Methyl salicylate	$iv$. Fries rearrangement