MCQ
Petroleum refining is
- ✓Distillation of petroleum to get different fractions
- BObtaining aromatic compounds from aliphatic compounds present in petroleum
- CCracking of petroleum to get gaseous hydrocarbons
- DPurification of petroleum
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How can this reaction is made to proceed in forward direction?

Assertion $(A)$ and the other is labeled as Reason $(R)$. Assertion $(A)$: $\mathrm{CH}_2=\mathrm{CH}-\mathrm{CH}_2-\mathrm{Cl}$ is an example of allyl halide
Reason$(R)$: Allyl halides are the compounds in which the halogen atom is attached to $\mathrm{sp}^2$ hybridised carbon atom.
In the light of the two above statements, choose the $most \ appropriate$ answer from the options given below:

${P_4} + 6Cl_2\xrightarrow{\Delta }PC{l_3}$
$C{H_3} - C{H_2} - Br\xrightarrow{{{\text{alc}}{\text{.KCN}}}}$ $C{H_3}C{H_2}CN$$\xrightarrow{{{\text{HOH}}}}X$
