NEET levelSingle correct optionDifficulty 1 of 3rg157
Assertion (A): The second virial coefficient of a gas is negative at low temperature. Reason (R): At low temperature intermolecular attraction dominates over repulsion. 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
For a van der Waals gas B=b−a/RT. At low T the attraction term a/RT exceeds the repulsive term b, making B negative. R correctly explains A.