Which of the following statement(s) is/are true? (a) Rise in compressibility factor with increas...

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Which of the following statement(s) is/are true?
(a) Rise in compressibility factor with increasing pressure is due to \( b \).
(b) Average velocity of molecules of an ideal gas in a container moving only in one dimension will be zero.
(c) The fraction of molecules having speeds in the range of \( u \) to \( u+\mathrm{d} u \) of a gas of molar mass \( M \) at temperature \( T \) is the same as that of the gas of molar mass \( M / 2 \) at temperature \( T / 2 \).
(d) Near critical condition, gases behave ideally.
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