Allotrope of carbon used to make black paint.
Graphite
Diamond
Amorphous Carbon
CO2
Valency of carbon is
1
2
3
4
Choose the allotrope of carbon.
Amorphus silicon
Crystalline silicon
None of these
Melting point of diamond is
350oc
3550oc
4000oc
1000C
Choose the elements having most number of compounds.
Carbon
Oxygen
Hydrogen
Nitrogen
Silicon
Amorphous silicon
Ilmenite
Group number of carbon is
11
12
14
13
Covalent bonds are formed by ___________ valence electrons.
Donating
Receiving
Sharing
Which substance is used to cut glasses?
Ozone
Steel
Steel is an alloy based on iron and
Nickel
Magnesium
Aluminium
