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