Propane can be separated from propene by using......

Which of the following compounds represents acrylonitrile?

Given below are two statements for the following reaction sequence.
Statement $I$: Compound $'Z'$ will give yellow precipitate with $NaOI$.
Statement $II$: Compound $'Q'$ has two different types of $'H'$ atoms (aromatic : aliphatic) in the ratio $1 : 3$.
In the light of the above statements, choose the correct answer from the option given below:

Identify the product $(C)$ in the following reaction sequence:
$CH_3-CH(Cl)-CH(Cl)-COO^-$ $\xrightarrow{-CO_2} A$ $\xrightarrow{HCl} B$ $\xrightarrow{aq. KOH} C$

What is the degree of unsaturation (double bond equivalent) in compound $(A)$?

The products obtained in the above Wurtz reaction are: