JEE Mains 27-July-2022 Shift 1 Solved Paper

The molar heat capacity for an ideal gas at constant pressure is 20.785JK−1mol−1. The change in internal energy is 5000J upon heating it from 300K to 500K. The number of moles of the gas at constant volume is _______. [ [Nearest integer] (Given: R=8.314JK−1mol−1 )