Question

Which of the following elements of group V-A does not show allotropy?

• A. $N$
• B. $Bi$
• C. $P$
• D. $As$

Answer 1

The correct option is B $Bi$

The element that does NOT exhibit allotropy is bismuth. Nitrogen (solid) has two allotropes. Antimony has three allotropes. Phosphorus and arsenic have several allotropes.

Nitrogen →α nitrogen and β-nitrogen (solid crystalline forms)

Phosphorus → White. Red and Black forms

Arsenic → Yellow and Grey forms

Antimony → Yellow and Grey forms

Hence, option (B) is correct.