Aromatic aldehydes are converted into acyloins in the presence of cyanide ions as a catalyst. What is this reaction called?

Identify the product of the following reaction: $CH_3-CH=CH-CH_2-C \equiv N \xrightarrow[H_3O^{+}]{\text{DIBAL-H}} \text{Product}$

Which reagent is suitable for the following transformation?

Identify the major product $A$ in the following reaction:
[Image of the reaction: $A$ substituted tetralin derivative with a ketone group,a chlorine atom,and a nitro group,reacting with $N_2H_4/KOH/H_2O$ (Wolff-Kishner reduction)]

Which one of the following is the major product of the given reaction?

$2CD_2=O + OH^- \xrightarrow{\quad} X + Y$ ($Y$ is an alcohol and $D$ is deuterium). Identify $X$ and $Y$.