Carbon forms _________ compounds.

Choose the allotrope of carbon.

Choose the allotrope of carbon.

Which substance is used to cut glasses?

Steel is an alloy based on iron and

Allotrope of carbon used to make black paint.

Graphite is a good _________ of electricity.

Covalent bonds are formed by ___________ valence electrons.

Melting point of diamond is

Choose the elements having most number of compounds.