In which of the following reactions will a change in pressure not affect the rate of reaction?

  • A
    $PCl_3(g) + Cl_2(g) \rightleftharpoons PCl_5(g)$
  • B
    $N_2(g) + 3H_2(g) \rightleftharpoons 2NH_3(g)$
  • C
    $N_2(g) + O_2(g) \rightleftharpoons 2NO(g)$
  • D
    $2SO_2(g) + O_2(g) \rightleftharpoons 2SO_3(g)$

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