JEE Main 2019 Chemistry question
Consider the van der Waals constants, a and b, for the following gases.
| Gas | Ar | Ne | Kr | Xe | |---|---|---|---|---| | a/(atm dm mol) | 1.3 | 0.2 | 5.1 | 4.1 | | b/(10 dm mol) | 3.2 | 1.7 | 1.0 | 5.0 |
Which gas is expected to have the highest critical temperature?
Answer: (C)
Solution
∝ a/b: Kr 5.1 is largest.