Question

Naphthalene balls are obtained from coal tar and are used as

a) mosquito repellant

b) honey bee repellant

c) moth repellant

d) snake repellant​

Answer 1

Answer:

mosquito repellant is correct

Answer 2

$\huge\mathcal\colorbox{yellow}{{\color{blue}{AnSwEr~↓~↓~}}}$

$\huge{\boxed{Moth\:Repellant}}$

The toxic gas prevents the damage from moth or moth larvae and other insects i.e. it is used to repel the moth, therefore known as repellent.  Naphthalene balls are also known as moth balls. Thus, naphthalene balls are obtained from coal tar and used as a moth repellent.