When water vapour is passed over hot coke, water gas is formed.Which of the following constitutes the water gas?

Carbon dioxide & Oxygen

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Carbon monoxide & Hydrogen

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Carbon dioxide & Nitrogen

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Carbon monoxide & Nitrogen

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Solution

The correct option is B Carbon monoxide & Hydrogen
Water gas is a poisonous, colourless gas and burns with an almost colourless flame (light blue). It gets the name because water in the form of steam is passed through coke to manufacture the gas.It is a mixture of carbon monoxide and hydrogen. The reaction is as follows

$C (s) + H_{2} O (g) \to (C O + H_{2}) (g)$
Coke Steam Water gas

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