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Question

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


A
N
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B
Bi
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C
P
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D
As
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Solution

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.

Chemistry

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