Which of the following statement(s) is/are correct? — States of Matter and Gaseous State Chemistry Question

💡 Solution & Explanation

At the critical point, the meniscus separating liquid and gas disappears, forming a supercritical fluid where physical state and phase boundaries are indistinguishable. Properties like density and refractive index become identical for both phases. Furthermore, easily liquefiable gases have high critical temperatures and strong intermolecular forces (large 'a'), which directly corresponds to a higher Boyle temperature ($T_B = a/Rb$). Therefore, correct answer is A,B,C,D.