Gas masks work on the principle of:

physical adsorption

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chemical adsorption

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both physical and chemical adsorptions

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none of the above

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Solution

The correct option is B physical adsorption
Gas masks-It is a device which consists of activated charcoal. This is used to adsorb poisonous gases. Physical adsorption takes place as their is not any chemical bonding between activated charcoal and gases

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Gas masks containing activated charcoal to remove poisonous gases from atmosphere acts on principle of -

\frac{x}{m} = k p^{0.5}

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