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Liquefaction of Gases and Critical Constants

Select the co...

Question

Select the correct statement as critical point is approached:

The density of

C O_{2} (l)

increases and that of

C O_{2} (g)

decreases and at

T = T_{c}

densities are equal

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The density of

C O_{2} (l)

decreases and that of

C O_{2} (g)

increases and at

T = T_{c}

densities are equal

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The density of both

C O_{2} (l)

and

C O_{2} (g)

increase

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The density of both

C O_{2} (l)

and

C O_{2} (g)

decrease

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Solution

The correct option is B The density of $C O_{2} (l)$ decreases and that of $C O_{2} (g)$ increases and at $T = T_{c}$ densities are equal
At critical temperature $(T_{c})$ , density of liquid becomes equal to density of gas.
Hence, when $T_{C}$ is approached, density of liquied $C O_{2}$ decreases and that of gaseous $C O_{2}$ increases.

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