A gas mixture consists of $8$ moles of argon and $6$ moles of oxygen at temperature $T$. Neglecting all vibrational modes, the total internal energy of the system is
  • A $29 \mathrm{RT}$
  • B$20 \mathrm{RT}$
  • C$27 \mathrm{RT}$
  • D$21 \mathrm{RT}$
JEE MAIN 2024, Diffcult
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