Which of the following oxides of nitrogen is the most stable?

  • A
    $2NO_{2(g)} \rightleftharpoons N_{2(g)} + 2O_{2(g)}$; $K = 6.7 \times 10^{16}$
  • B
    $2NO_{(g)} \rightleftharpoons N_{2(g)} + O_{2(g)}$; $K = 2.2 \times 10^{30}$
  • C
    $2N_2O_{5(g)} \rightleftharpoons 2N_{2(g)} + 5O_{2(g)}$; $K = 1.2 \times 10^{34}$
  • D
    $2N_2O_{(g)} \rightleftharpoons 2N_{2(g)} + O_{2(g)}$; $K = 3.5 \times 10^{33}$

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