Read the Assertion and Reason below and choose the correct option. — States of Matter and Gaseous State Chemistry Question

💡 Solution & Explanation

Statement I is correct; H₂ and He exhibit $Z > 1$ at all pressures at 273 K, leading to a continuously positive slope in a PV vs P plot. Statement II is correct and is the explanation for Statement I. Because their Boyle temperatures are well below 273 K, at 273 K the repulsive forces dominate over attractive forces at all pressures, causing positive deviation. Therefore, correct answer is A.