Q.

The heats of combustion of ethane, ethene and acetylene are -341.1, -330 and –310.9 K.Calmol–1 respectively. The best fuel among them is

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answer is 3.

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Detailed Solution

Fuel with highest calorific value is best fuel.Higher calorific value is for acetyleneHence it is better fuel.
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The heats of combustion of ethane, ethene and acetylene are -341.1, -330 and –310.9 K.Calmol–1 respectively. The best fuel among them is