Question

Identify the primary alkyl halide from following:
$
  A.C{H_3}C{H_2}Cl \\
  B.C{H_3}Cl \\
  C.C{H_3}C{H_2}C{H_2}Cl \\
  D.All\,of\,these \\
$

Answer 1

Hint: To get this problem solved students need to know that primary alkyl halides also called one degree alkyl halide are those compounds in which halogen is attached to primary carbon. Knowing this will solve your problem and will provide you the right answer.
The compounds in which hydrocarbons are present with one functional group and that is halogens then those compounds are called alkyl halides.

Complete step-by-step answer:
The methods used to prepare alkyl halides and the reactions that alkyl halides undergo frequently depend on whether the alkyl halide is primary, secondary, or tertiary.
Alkyl halides (RX, where R is an alkyl group and X is F, Cl , Br, or I) are defined as primary, secondary or tertiary by the degree of carbon substitution to which halogen is attached. In the primary alkyl halide, the halogen-bearing carbon is directly bound to another carbon, in the secondary alkyl halide to two, and in the tertiary alkyl halide to three.
If in any given compound a halogen is attached to $C{H_2}$ group then those compounds are called primary alkyl halides.
Here in this problem you can see that in option A halogen is attached to $C{H_2}$ group, in option B halogen is attached to $C{H_2}$ group and the same is in C.
So, the correct option is D, all of these.

Note – In organic chemistry there are various such concepts in which names have been assigned according to the constituents present in the formula. Also sometimes there are different names for example phenol just shows the functional group but p-hydroxy benzene shows us the exact constituents of the compound. Knowing such things will help you to grab things in organic chemistry.