Question

Which of the following does not exist in solid state at room temperature?

• A. $1,4-$dichlorobenzene
• B. $1,3-$dichlorobenzene
• C. $1,2-$dichlorobenzene
• D. All of the above

Answer 1

Answer: (B), (C)

$1,3-$dichlorobenzene
$1,2-$dichlorobenzene

There are three dichlorobenzene isomers-1,2-dichlorobenzene,1,3-dichlorobenzene, and1,4-dichlorobenzene.

Dichlorobenzenes do not occur naturally.

1,2-Dichlorobenzene is a colorless to pale yellow liquid.

1,3- Dichlorobenzene is a colorless liquid.

1,4-Dichlorobenzene, the most important of the three chemicals, is a colorless white solid with a strong, pungent odor.

Options B and C are correct.