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A gas at 350 K and 15 bar has molar volume 20 percent smaller than that for an ideal gas under the same conditions. The correct option about the gas and its compressibility factor ($Z$) is:
A
$Z>1$ and attractive forces are dominant
B
$Z>1$ and repulsive forces are dominant
C
$Z<1$ and attractive forces are dominant
D
$Z<1$ and repulsive forces are dominant
Detailed Solution
Compressibility factor $Z=\frac{V_{real}}{V_{ideal}}$
Since $V_{real}<V_{ideal}$ (20% smaller), $Z<1$.
If $Z<1$, attractive forces are dominant among the gaseous molecules and the gas can be liquefied easily.