Q. Wood charcoal is used in gas masks because

A
Its poisonous
B
It liquifies gas
C
It is porous
D
It absorb gases
Solution:

The high porosity of wood charcoal is responsible for its significant adsorption properties. At normal temperature wood charcoal is capable of combining with the oxygen in air; this is the reason for cases of spontaneous combustion of wood charcoal. The moisture content of wood charcoal unloaded from furnaces and retorts is 2-4 percent.

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