Which of the following gas is used in homes for cooking?
Liquefied petroleum gas
The question asks which gas is commonly used as domestic cooking fuel.
The correct answer is Liquefied Petroleum Gas (LPG), which is supplied to homes in pressurised cylinders.
LPG is chiefly a mixture of propane and butane, hydrocarbons that burn readily to release a large amount of heat, making it an efficient cooking fuel.
An odourant such as ethyl mercaptan is deliberately added to LPG so that any leakage can be detected by its smell for safety.
Argon (option 1) is an inert noble gas used in light bulbs and welding, not as a fuel, since it does not burn.
Nitrogen (option 2) is an inert gas used for packaging and preservation; it does not support combustion.
Oxygen (option 4) supports burning but is not itself a fuel, and pure oxygen is never piped for cooking.
Hence, the gas used in homes for cooking is Liquefied petroleum gas.
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