The soft coal which has high heat content is
Bituminous coal
Anthracite
Lignite
Peat
The metal added to gasoline to prevent 'knocking'.
Sodium
Lead
Silver
Copper
The polymer used in non - stick frying pans and non - stick taps is
PVC
PTFE
PS
PP
The process in which larger molecules from heavier fractions can be broken into smaller molecules
Calcination
Hydrogenation
Refining
Catalytic cracking
The hardest coal with the highest carbon content is
Quinol
Hexanal
Mucolite
The surface layer of the skin is made protein called
Keratin
Haemoglobin
Myoglobin
Glycogen
Terylene is a
Polyamide
Polyethene
Polypropane
Polyester
