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Hydrogen
Carbon monoxide
Air
Methane
The gas used for artificial ripening of green fruit is
The gas used for cooking (LPG) is chiefly a mixture of
The gas used in the manufacture of vanaspati from vegetable oil is
The gas used in the manufacture of vegetable oil from vegetable is
The gas used to extinguish fire is
The gas which, on heating at high temperatures under high pressure, transforms into a waxy solid is
The graphite rods in the nuclear reactor
The Green House effect is produced due to the presence of excess amount of
The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind?
The hardened material available on earth is