The product $(A)$ of the given reaction is:

By which of the following processes are hydrocarbons obtained from petroleum?

Given below are two statements.
Statement $I$: On heating with $KHSO_4$,glycerol is dehydrated and acrolein is formed.
Statement $II$: Acrolein has fruity odour and can be used to test glycerol's presence.
Choose the correct option.

$A$ hydrocarbon with molecular formula $C_4H_6$ undergoes the following reactions:
$A$. Decolourises molecular bromine.
$B$. Reacts with $HBr$.
$C$. Addition of ozone and then cleavage of the ozonide by $Zn / H_2O$ gives the product $C_4H_6O_2$.
Then,the structure of the hydrocarbon is:

What is the decreasing order of acidic strength for ethane $(I)$,ethene $(II)$,ethyne $(III)$,and propyne $(IV)$?

The total number of sigma $(\sigma)$ and pi $(\pi)$ bonds present in $\text{hex}-1-\text{en}-4-\text{yne}$ are respectively: