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| Q. |
Which of the following gas is used in cigarette lighters? |
| A. | Butane |
| B. | Propane |
| C. | Methane |
| D. | Ethane |
| Answer» A. Butane | |
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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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