A certain reaction ocuurs in two steps as
(I) `2SO_(2(g))+2NO_(2(g)) to 2SO_(3(g))+2NO_((g))`
`(ii) 2NO_((g) ) +O_(2) (g) to 2NO_(2(g))`
In the reaction ,______.

Options

A. `NO_(2)` (g) is intermediate
B. NO(g) is intermediate
C. NO (g) is catalyst
D. `O_(2)`(g) is intermediate

Answer

B

Explanation

NO formed in first step and consumed in second step.