JEE Advanced levelSingle correct optionDifficulty 3 of 3rg142
Assertion (A): For a van der Waals gas the Boyle temperature is always higher than the critical temperature. Reason (R): TB/Tc=27/8 for any van der Waals gas. Choose the correct option.
ABoth A and R are true and R is the correct explanation of A
BBoth A and R are true but R is not the correct explanation of A
CA is true but R is false
DA is false but R is true
Answer: A
TB=a/Rb and Tc=8a/27Rb, so TB/Tc=27/8=3.375, which is greater than 1 for every gas. The ratio in R directly establishes A.