The reaction of $CH_3CH_2CHO$ with $PCl_5$ yields a product. Identify the type of dihalide formed.

Identify the major product of the following reaction:

Which of the following compounds gives a yellow solid product when reacted with $NaOI$?

Which of the following compounds shows tautomerism?

$p$-cresol reacts with chloroform in an alkaline medium to give compound $A$,which adds hydrogen cyanide to form compound $B$. The latter,on acidic hydrolysis,gives a chiral carboxylic acid. The structure of the carboxylic acid is:

Identify the product of the following reaction: $Formaldehyde + Benzaldehyde \xrightarrow[H_3O^{+}]{conc. NaOH} \text{product}$