1. NH ₃ 2. O ₂ 3. H ₂ 4. CO ₂

Answer: 1. NH ₃ The more easily a gas liquefies, the stronger its intermolecular attraction, and the van der Waals constant a measures exactly this attraction. Values of a : NH₃ 4.17, CO₂ 3.59, O₂ 1.36, H₂ 0.244. The largest is NH₃ (it also has hydrogen bonding), so it is liquefied most easily. H₂ has the smallest a and is the hardest to liquefy.

Topic: Dynamic equilibrium and physical equilibria, Henry's law· Equilibrium

Given van der Waals constant for NH_3, H_2, O_2 and CO_2 are respectively 4.17, 0.244, 1.36 and 3.59, which one of the following gases is most easily liquefied ?

1. NH\(_3\)

2. O\(_2\)

3. H\(_2\)

4. CO\(_2\)

Doubtly Asked 30 Oct 2026 NEET UG 2018 neet Save WhatsApp Report

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Answer: 1. NH\(_3\)

The more easily a gas liquefies, the stronger its intermolecular attraction, and the van der Waals constant \(a\) measures exactly this attraction.

Values of \(a\): \(\mathrm{NH_3}\) 4.17, \(\mathrm{CO_2}\) 3.59, \(\mathrm{O_2}\) 1.36, \(\mathrm{H_2}\) 0.244. The largest is \(\mathrm{NH_3}\) (it also has hydrogen bonding), so it is liquefied most easily. \(\mathrm{H_2}\) has the smallest \(a\) and is the hardest to liquefy.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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Given van der Waals constant for NH_3, H_2, O_2 and CO_2 are respectively 4.17, 0.244, 1.36 and 3.59, which one of the following gases is most easily liquefied ?

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