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$PV$ versus $T$ graph of equal masses of ${H_2}$, $He$ and ${O_2}$ is shown in fig. Choose the correct alternative
  • A$C$ corresponds to ${H_2}$, $B$ to $He$ and $A$ to ${O_2}$
  • B$B$ corresponds to $He,$ $A$ to ${H_2}$ and $C$ to ${O_2}$
  • C$A$ corresponds to $He, B$ to ${H_2}$ and $C$ to ${O_2}$
  • D$A$ corresponds to ${O_2}$,$ B$ to ${H_2}$ and $C$ to ${H_2}$
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