NEET2012ChemistryStates of MatterActual
For real gases van der Waals' equation is written as (p+ a n^2 V^2 )(V-n b)=n R T where, a and b are van der Waals' constants. Two sets of gases are I. O ₂, CO ₂, H ₂ and He II. CH ₄, O ₂ and H ₂ The gases given in set-I in increasing order of ' b ' and gases given in set-II in decreasing order of ' a ', are arranged below. Select the correct order from the following.
Options
- A(I) He H ₂> O ₂
- B(I) O ₂ O ₂> CH ₄
- C(I) H ₂ O ₂> H ₂
- D(I) H ₂ CH ₄> H ₂
Correct answer
C. (I) H ₂ O ₂> H ₂
Step-by-step solution
From experimental values of a and b , sequence of van der Waals' constant, (b) is Hence correct order is H ₂ Hence, correct order is (II) CH ₄> O ₂> H ₂