Here $NO _2$ 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 th

$2N{O_2}(g)$ $ \rightleftharpoons $ ${N_2}(g) + 2{O_2}(g)$; $K = 6.7 \times {10^{16}}\,mol\,{l^{ - 1}}$

Here $NO _2$ 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.

3.Chemical KineticsMedium

निम्न में से कौनसा नाइट्रोजन का ऑक्साइड अत्यधिक स्थायी है

A
$2N{O_2}(g)$ $ \rightleftharpoons $ ${N_2}(g) + 2{O_2}(g)$; $K = 6.7 \times {10^{16}}\,mol\,{l^{ - 1}}$
B
$2NO(g)$ $ \rightleftharpoons $ ${N_2}(g) + {O_2}(g)$; $K = 2.2 \times {10^{30}}\,mol\,{l^{ - 1}}$
C
$2{N_2}{O_5}(g)$ $ \rightleftharpoons $ $2{N_2}(g) + 5{O_2}(g)$; $K = 1.2 \times {10^{34}}\,mol\,{l^{ - 5}}$
D
$2{N_2}O(g)$ $ \rightleftharpoons $ $2{N_2}(g) + {O_2}(g)$; $K = 3.5 \times {10^{33}}\,mol\,litr{e^{ - 1}}$