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Oxygen
Hydrogen
Methane
Butane
Laundry soap is
Lead caulked joints are used for laying
Lead pencil contains
Liquid hydrocarbons are converted to low molecular weight gaseous hydrocarbons by a process known as
Magnalium is an alloy of
Magnetite is
Main pollutant present in automobile exhaust is
Major gaseous pollutant of the thermal power station is
Man dies in the atmosphere of CO, because it
Many marine animals use _ dissolved in sea-water to make their shells.