Which of the following gas is known as illuminating gas?
A
Ethane
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B
Ethene
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C
Ethyne
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D
Propane
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Solution
The correct option is C Ethyne Ethyne; the simplest alkyne, a hydrocarbon of formula HC≡CH. It is a colourless gas, with a peculiar, unpleasant odour, formerly used as an illuminating gas.