Which among the following is $NOT$ a benzylic halide?

In chloroethane,the carbon bearing halogen is bonded to ... hydrogen $(s)$. It is called ...... alkyl halide.

Which among the following compounds is a vinylic halide?

Given below are two statements,one is labeled as Assertion $(A)$ and the other is labeled as Reason $(R)$.
Assertion $(A)$: $CH_2=CH-CH_2-Cl$ is an example of an allyl halide.
Reason $(R)$: Allyl halides are the compounds in which the halogen atom is attached to an $sp^3$ hybridized carbon atom,which is adjacent to a carbon-carbon double bond.
In the light of the two above statements,choose the most appropriate answer from the options given below:

The structural formula for Lewisite is:

Explain the nomenclature of haloalkanes containing two identical halogen atoms with examples,or state their differences.