Carbon exists in ……………. forms.
a) crystalline allotropic
b) non crystalline form
c) amorphous allotropic
d) all of these
Carbon exists in ………. crystalline forms.
a) one
b) two
c) three
d) four
Carbon exists in the crystalline forms namely
a) diamond
b) graphite
c) bucky balls
d) all of these
Carbon exist in amorphous allotropic form such as ……………
a) coke
b) charcoal
c) lampblack
d) all of these
Diamond is the crystalline allotropic form of
a) carbon
b) sulphur
c) tin
d) copper
Diamond is hard due to ………….
a) covalent bond
b) ionic bond
c) coordinate covalent bond
d) metallic bond
