Answer :
Buckminsterfullerene is an allotropic form of the element:
One of the following is not an allotrope of carbon. This is : (a) diamond (b) graphite (c) cumene (d) buckminsterfullerene
A basic oxide will be formed by the element :
(a) sulphur
(b) phosphorus
(c) potassium
(d) carbon
What is the valency of :
(a) fluorine in CaF2 (b) sulphur in SF6
(c) phosphorus in PH3 (d) carbon in CH4