An element that exhibits allotropy is:
Carbon.
Sulphur.
All are correct.
Phosphorus.
The two crystalline allotropes of carbon are:
Amorphous carbon and diamond.
Coke and diamond.
Diamond and graphite.
Amorphous carbon and graphite.
Diamond has a very high melting point and is resistant to chemical attack due to:
The strength of the dative covalent bonds in its crystals lattice.
The strength of the covalent bonds in its crystals lattice.
The strength of the metallic bonds in its crystals lattice.
The strength of the covalent and ionic bonds in its crystals lattice.
The type of hybridisation undergone by diamond is:
sp.
sp⁴.
sp³.
sp².
Carbon occurs:
None is correct.
Only in the uncombined states.
Both in the combined and the uncombined states.
Only in the combined states.
