Which among the following is the cleanest fuel?

cow dung cake

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petrol

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kerosene

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hydrogen gas

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Solution

The correct option is D hydrogen gas
When hydrogen burns in air, it produces nothing but water vapor. It is therefore the cleanest possible fuel, totally non-polluting. Cow dung, kerosene and petrol produce a large amount of smoke while burning, which pollutes the environment. Therefore, they are not eco-friendly or clean fuels.

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Similar questions

Among the following fuels, which has the least calorific value:

CNG, Petrol, Cow Dung Cake, Wood.

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