Which of the following exists in more nu...

Which of the following exists in more number of allotropic forms

Nitrogen

Bismuth

Arsenic

Phosphorus

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Which of the following exists in polymeric form

`AlCl_3`

`BeCl_2`

SiC

`B_2H_4`

`HPO_(3)`

`H_(4)P_(2)O_(7)`

`H_(3)PO_(4)`

None of these

`C_(60)` molecule has a shape like soccer ball and called

Graphite is thermodynamically most stable allotrope of carbon.

Graphite fibres embedded in plastic material from high strength, lightweight composites.

In diamond each carbon atom undergoes `sp^(3)` hybridisation and is paramagnetic.