The reaction of phthalaldehyde with concentrated $NaOH$ produces:

Base-catalyzed aldol condensation occurs with:

Reactant $(A)$ is:

Which of the following compounds is the least reactive towards nucleophilic addition reactions?

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)]

Identify the reaction in which the carbonyl group of aldehydes and ketones is reduced to a methylene group upon treatment with zinc-amalgam and concentrated hydrochloric acid.