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Water gas is made by blowing steam through the layer of incandescent coal.

1. H2O + C -> H2 + CO (Steam, Red hot, Water gas).
2. Glass is a super cooled liquid.
3. Supercooling is the process of lowering the temperature of a liquid or gas below its freezing point without becoming a solid.
4. SiCl4 gets hydrolysed in moist air and gives white fumes which are used as a smoke screen in warfare.

Correct answer: H2O + C -> H2 + CO (Steam, Red hot, Water gas).

Solution

Water gas is a mixture of hydrogen and carbon monoxide, produced by blowing steam through incandescent coal.

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