NEET 2019 Chemistry question

Chemistry States of Matter (Gaseous & Liquid State)NEET 2019

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 () is :

(1) and attractive forces are dominant
(2) and repulsive forces are dominant
(3) and attractive forces are dominantCorrect
(4) and repulsive forces are dominant

Answer: (3)

Solution

The compressibility factor is (same , , ). The real molar volume is 20% smaller, so and . means the gas is more compressible than

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Question ID VK-092458