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Question

Consider the equation, Z=PVnRT.


Which of the following statements is correct?

A
When Z>1, real gases are easier to compress than the ideal gas
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B
When Z=1, real gases get compressed easily
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C
When Z>1, real gases are difficult to compress
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D
When Z=1, real gases are difficult to compress
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Solution

The correct option is B When Z>1, real gases are difficult to compress
In z=PVnRT
If z>1, it is positive deviation.
It shows that gas is less compressible than expected from ideal behaviour
so when z>1, real gases are difficult to compress.

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