Question

Which Oxide of Nitrogen is most stable?

• A. $2N{O}_{2\left(g\right)}\rightleftharpoons N_{2\left(g\right)}+2O_{2\left(g\right)}$
  $K=6.7\times {10}^{16}$ mol $L^{-1}$
• B. $2N{O}_{\left(g\right)}\rightleftharpoons N_{2\left(g\right)}+O_{2\left(g\right)}$
  $K=2.2\times {10}^{30}$
• C. $2N_2{O}_{5\left(g\right)}\rightleftharpoons 2N_{2\left(g\right)}+5O_{2\left(g\right)}$
  $K=1.2\times {10}^{34}mo{l}^5{L}^{-5}$
• D. $2N_2{O}_{\left(g\right)}\rightleftharpoons 2N_{2\left(g\right)}+O_{2\left(g\right)}$
  $K=3.5\times {10}^{33}$ mol $L^{-1}$

Answer 1

Answer: (A)

$2N{O}_{2\left(g\right)}\rightleftharpoons N_{2\left(g\right)}+2O_{2\left(g\right)}$

$K=6.7\times {10}^{16}$ mol $L^{-1}$

Here $N{O}_2$ is the correct answer because lower is the value of k, lesser will be a tendency to show the forward reaction.

Thus option A is the correct answer.