Neon gas of a given mass expands isothermally to double volume. What should be the further fractional decrease in pressure, so that the gas when adiabatically compressed from that state, reaches the original state?
  • A$1-2^{-2 / 3}$
  • B$1-3^{1 / 3}$
  • C$2^{1 / 3}$
  • D$3^{2 / 3}$
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