The reaction $CH_3CHO \xrightarrow[Zn(Hg) / \text{Conc. } HCl]{[H]} CH_3CH_3$ is:

Arrange the following compounds in increasing order of their reactivity in nucleophilic addition reactions.
$(i)$ Ethanal,Propanal,Propanone,Butanone.
$(ii)$ Benzaldehyde,$p-$Tolualdehyde,$p-$Nitrobenzaldehyde,Acetophenone.
Hint: Consider steric effect and electronic effect.

You have two $C_6H_{10}O$ ketones,$I$ and $II$. Both are optically active,but $I$ is racemized by treatment with acid and $II$ is not. Wolff-Kishner reduction of both ketones gives the same achiral hydrocarbon,formula $C_6H_{12}$. What reasonable structures may be assigned to $I$ and $II$ respectively?

How many total oximes are possible for ketones having molecular formula $C_3H_6O$,$C_4H_8O$ and $C_5H_{10}O$?

Which one of the following is produced when acetone is saturated with $HCl$ gas?

$Ph-CH(OH)-CH_3$ $\xrightarrow{PCC} (A)$ $\xrightarrow{NH_2-NH-C(=O)-NH_2} (B)$. Product $(B)$ is: