Choose the allotrope of carbon.
Diamond
Amorphus silicon
Crystalline silicon
None of these
Graphite is a good _________ of electricity.
Insulator
Conductor
Neutral conductor
Non conductor
Melting point of diamond is
350oc
3550oc
4000oc
1000C
Allotrope of carbon used to make black paint.
Graphite
Amorphous Carbon
CO2
Group number of carbon is
11
12
14
13
Covalent bonds are formed by ___________ valence electrons.
Donating
Receiving
Sharing
Carbon forms _________ compounds.
Ionic
Covalent
Both (a) & (b)
Which substance is used to cut glasses?
Ozone
Steel
Valency of carbon is
1
2
3
4
Silicon
Amorphous silicon
Ilmenite
