Steel is an alloy based on iron and
Nickel
Magnesium
Aluminium
Carbon
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.
Diamond
Amorphus silicon
Crystalline silicon
Silicon
Amorphous silicon
Graphite
Ilmenite
Carbon forms _________ compounds.
Ionic
Covalent
Both (a) & (b)
Allotrope of carbon used to make black paint.
Amorphous Carbon
CO2
Choose the elements having most number of compounds.
Oxygen
Hydrogen
Nitrogen
Which substance is used to cut glasses?
Ozone
Steel