Chemistry · PYQ NEET UG 2021

For irreversible expansion of an ideal gas under isothermal condition, the correct option is _______.

1. A
   \( \Delta U \neq 0, \Delta S_{\text{total}} \neq 0 \)
2. B
   \( \Delta U = 0, \Delta S_{\text{total}} \neq 0 \)
3. C
   \( \Delta U \neq 0, \Delta S_{\text{total}} = 0 \)
4. D
   \( \Delta U = 0, \Delta S_{\text{total}} = 0 \)