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Question

In terms of the least polluting source of energy, is an ideal fuel.

A
Hydrogen
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B
Coal
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C
Crude oil
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D
LPG
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Solution

The correct option is A Hydrogen
Hydrogen fuel is a zero-emission fuel. In a flame of pure hydrogen gas, hydrogen (H2) reacts with oxygen (O2) to form water (H2O) and releases energy.
2H2(g)+O2(g)2H2O(g)
It is used in the propulsion of spacecraft and might potentially be mass-produced and commercialized for passenger vehicles and aircraft.

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