Question

Which of the following molecules, in pure form, is (are) unstable at room temperature ?

Answer 1

Correct  answer is b and c

Answer 2

Answer:

(b) and (C) is the correct answer.

Explanation:

This is a multiple answer correct question.

All the compounds are considered as pure forms.

The compound (b) is cyclobutadiene.

It is anti aromatic compound.

It has formula C4H4.

It is a very reactive compound.

It is cyclic compund.

It has overlapping of people orbitals.

So the compound is non aromatic.

The compound (c) also is anti aromatic.

It is proved using Huckel's rule for aromaticity.

It has 8π electrons.

They are highly unstable because of this.

Hence (b) and (C) is the correct answer.