Question

Which of the following is redox reaction .

• A. $H_{2}SO_{4}$ with $NaOH$
• B. In atmosphere, $O_{3}$ from $O_{2}$ by lightning
• C. Evaporation of $H_{2}O$
• D. Nitrogen oxides form nitrogen and oxygen by lightning

Answer 1

Answer: (D)

Nitrogen oxides form nitrogen and oxygen by lightning

Answer 2

$\overset{0}{2N_{2}} + \overset{0}{O_{2}} \rightarrow \overset{}{\overset{+ 2}{2N}\overset{- 2}{O}}$

Here O.N. of N increases from O in $N_{2}$ to +2 in NO,

2– and that of decreased from O in $O_{2}$ to –2 in O, therefore, it is a redox reaction.