The product not obtained from coal is
coke
coal tar
coal gas
petroleum
D.
petroleum
The major constituent of natural gas is/are
butane
methane
methane + hydrogen
ethane
B.
methane
The greenhouse effect is due to an excessive emission of
oxides of sulphur
oxides of nitrogen
carbon dioxide
oxides of carbon
C.
carbon dioxide
The energy stroed in the fossil fuels is :
heat energy
electrical energy
chemical energy
mechanical energy
C.
chemical energy