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Liquefaction of Gases and Critical Constants

In the graph ...

Question

In the graph of Z vs P for a given gas, which of the following is incorrect?

A

At

T > T_{C}

, the gas is less compressible than ideal gas at all pressure

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B

At

T = T_{C}

, the gas is more compressible than ideal gas at low pressure

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C

At

T = T_{B}

, the gas follow Boyle's law at low pressure

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D

At

T > T_{B}

, the gas is less compressible than ideal gas at low pressure

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Solution

The correct option is A At $T > T_{C}$ , the gas is less compressible than ideal gas at all pressure
When the temperature of a gas is more than critical temperature, it is less compressible than ideal gas at all pressures. This is because the value of z is more than 1 and the real gas occupies larger volume than ideal gas.

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Boyle's temperature is the temperature at which a gas shows ideal behaviour over a
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(T_{b}) = \frac{a}{R b}

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Which of the following is correct?

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Liquefaction of Gases and Critical Constants

Standard XII Chemistry

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