Which of the following compounds will react with ethanolic $KCN$?

Write about the oxidation reaction of methyl ketone compounds $(R-CO-CH_3)$ by the haloform reaction or write a note on the Haloform test.

Arrange the following in the correct order of the rate of Nucleophilic Addition Reaction $(NAR)$:
$(I) \ HCHO$
$(II) \ CH_3CHO$
$(III) \ p-NO_2-C_6H_4CHO$
$(IV) \ p-CH_3-C_6H_4CHO$

Consider the above reaction sequence and identify the product $B$.

In the given reaction,what is $y$?
$CH_3CH_2COCH_2COOH$ $\xrightarrow{\Delta} x$ $\xrightarrow[(ii) H_2O]{(i) LiAlH_4} y$

Which one of the following compounds does not give a primary alcohol on reduction?