Chemistry · PYQ NEET UG 2019(2)

An ideal gas expands isothermally from \( 10^{-3} \) \( \mathrm{m^3} \) to \( 10^{-2} \) \( \mathrm{m^3} \) at \( 300 \) \( \mathrm{K} \) against a constant pressure of \( 10^5 \) \(\mathrm{Nm^{-2}}\. The work done on the gas is

1. A
   \( -900 \) \( \mathrm{kJ} \)
2. B
   \( +270 \) \( \mathrm{kJ} \)
3. C
   \( -900 \) \( \mathrm{J} \)
4. D
   \( +900 \) \( \mathrm{kJ} \)