question_answer 46)

    Which of the following elements does not show allotropy? (a) Nitrogen                       (b) Bismuth        (c) Antimony                      (d) Arsenic

Answer:

                    (a) Nitrogen does not show allotropy due to its weak N?N single bond. Therefore, ability of nitrogen to form polymeric structure .or more than one structure or form become less. Hence, nitrogen does not show allotropy.