JEE Main 2019 Chemistry question
Consider the following table:
| Gas | a/(kPa dm mol) | b/(dm mol) | |---|---|---| | A | 642.32 | 0.05196 | | B | 155.21 | 0.04136 | | C | 431.91 | 0.05196 | | D | 155.21 | 0.4382 |
a and b are van der Waals constants. The correct statement about the gases is:
Answer: (A)
Solution
Same b, smaller a for C (weaker attraction) ⇒ larger volume; same a, smaller b for B ⇒ more compressible.