Dry ice is
Crystal NaCl
Solid CO2
CO2
Liquid Nitrogen
Polymer of ethylene is
PVC
Polythene
Bakelite
Teflon
Crystalline, allotropic form of carbon is
Diamond
Coke
Charcoal
Coal
Graphite is soft because
It has three dimensional structure
It is black
It has layer structure
It has low density
Coke is obtained from coal by
Cracking
Distillation
Fractionation
Destructive distillation
The hardest material is
Graphite
Rock
Carbon reacts with metals to form
Carbides
Carbonates
Hydroxides
Oxides
Washing soda is
Sodium carbonate
Sodium bicarbonate
Sodium hydroxide
Sodium oxide
For the artificial ripening of fruits, the hydrocarbon used is
Ethene
Ethane
Ethyne
Benzene
The name of C8H18 is
Hexane
Propane
Methane
Octane
