Q.

Which of the following gas is used in cigarette lighters?

A. Butane
B. Propane
C. Methane
D. Ethane
Answer» A. Butane
Explanation: Butane, a highly flammable, colorless, easily liquefied gas used in gas-type lighters and butane torches. Naphtha, a volatile flammable liquid hydrocarbon mixture used in wick-type lighters and burners.
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