An insulator container contains $4\, moles$ of an ideal diatomic gas at temperature $T.$ Heat $Q$ is supplied to this gas, due to which $2 \,moles$ of the gas are dissociated into atoms but temperature of the gas remains constant. Then
  • A$Q = 2RT$
  • B$Q = RT$
  • C$Q = 3RT$
  • D$Q = 4RT$
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