Question

Primary, secondary, and tertiary alkyl halides belong to:
A. Monohalogen derivative
B. Dihalogen derivative
C. Trihalogen derivative
D. Tetra Halogen derivative

Answer 1

Hint: To answer this question you can just recall the structure of primary, secondary, and tertiary alkyl halides. There you just need to find the number of halogens present in their structure and you will easily get your answer.

Complete step by step answer:

The replacement of hydrogen atom in hydrocarbon, aliphatic or aromatic, by halogen atom results in the formation of alkyl halide(a haloalkane) and aryl halide(haloarene) respectively.
On the basis of the number of halogen atoms present, halogen derivatives are classified as mono, di, tri, tetra, etc.
Let’s see the examples of primary, secondary and tertiary alkyl halides -

These all structures have one halogen atom present in their structures. Halogen derivatives with one halogen are called mono halogen derivatives.

Therefore, we can conclude that the correct answer to this question is option A.

Note: We should also know the use of these derivatives in organic chemistry. In organic chemistry, the reaction mechanisms that are favorable and their rates can be theoretically determined using the degree of the alkyl halide (primary, secondary, or tertiary).
The most basic of these is the substitution reaction to become alcohol. Primary alkyl halides will undergo this substitution reaction slower than tertiary alkyl halides. Primary alkyl halides also react best in certain solvents that are polar aprotic, whereas tertiary alkyl halides react best in polar protic solvents.