Question

IN R-CH2-X substituion or elimination reaction takes place?

Which mechanism takes place
A.SN1
B.SN2
C.E1
D.E2

Answer 1

Option B is correct

It is a first degee or primary haloalkane and first degree haloalkane will show SN2 type substitution reaction.

The type of halogenoalkane

This is the most important factor.

type of halogenoalkane	substitution or elimination?
primary	mainly substitution
secondary	both substitution and elimination
tertiary	mainly elimination

For detail explanation why primary haloalkane will show SN2 type substitution go through the link i mentioned below
https://byjus.com/chemistry/sn1-and-sn2-reaction-of-haloalkanes/