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Which of the following Group `15` elements do not show allotropy?A. NB. AsC. SbD. Bi

Answer» Correct Answer - D
All the elements of group 15 except Bi show allotropy as nitrogen exists in two solid forms namely `alpha`-nitrogen and `beta`-nitrogen. Phosphorus exists in a number of allotropic forms. As exists as grey, yellow and black arsenic and Sb exists as metallic, `alpha` and `beta`-antimony.


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