The reaction $CH_2=CH_2 + H_2 \xrightarrow{Ni, 300^{\circ}C} CH_3-CH_3$ is known as:

Markovnikov's rule guides the addition of $HBr$ to which of the following compounds?

$A$ dibromide $X$ $(C_4H_8Br_2)$ on dehydrohalogenation gave $Y$,which on reduction with $Z$ gave a non-polar isomer of $C_4H_8$. What are $X$ and $Z$ respectively?

The conversion of $2,3-$dibromobutane to $2-$butene with $Zn$ is

Consider the above chemical reaction. The total number of stereoisomers possible for product $'P'$ is $.....$

Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of: