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Liquefaction of Gases and Critical Constants

CO2 gas below...

Question

$C O_{2}$ gas below ${31.2}^{o} C$ is called as:

C O_{2}

vapours

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C O_{2}

gas

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C O_{2}

liquid

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none of these

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Solution

The correct option is B $C O_{2}$ vapours
A vapour is a substance in the gas phase at a temperature lower than its critical point.
So below $T_{c} (T_{c}$ of $C O_{2} = {31.2}^{o} C$ ) gaseous state is referred as vapours.

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