Question

Which of the following is a redox reaction?
A)${H_2}S{O_4}\,with\,NaOH$
B) In the atmosphere ${O_3}$ from ${O_2}$ by lightning.
C) Nitrogen oxides from nitrogen and oxygen by lightning.
D) Evaporation of water.

Answer 1

Hint: We know that redox reaction is often defined as a reaction during which electrons are transferred between two reactants participating in it. This transfer of electrons is often identified by observing the changes within the oxidation states of the reacting species.

Complete step by step answer:
Now, we discuss the acid-base reaction,
Acid–base reaction is a type of chemical change identified as the exchange of one or more hydrogen ions between species which will be neutral (molecules, like water) or electrically charged (ions, like ammonium).
The reaction between sulfuric acid and sodium hydroxide is an example of acid base reaction.
Therefore, option A is incorrect.
The reaction is,
${H_2}S{O_4} + 2NaOH\xrightarrow{{}}N{a_2}S{O_4} + {H_2}O$
The reaction between oxygen and ozone in the atmosphere is an allotropic formation reaction.
Therefore, the option B is incorrect.
The reaction is,
$3{O_2}\xrightarrow{{}}2{O_3}$
The formation of oxides of nitrogen from nitrogen and oxygen by lightning is a redox reaction. In this formation the oxidation number of nitrogen atoms in nitrogen gas is zero and the oxidation number of nitrogen in nitrogen oxide is $ + 2$. Thus, nitrogen gas is reduced and the oxidation number of oxygen changes from zero to $ - 2$ and thus oxygen is oxidized.

So, the correct answer is Option C .

Note:
Now we can see the types of Redox Reactions. There are four different types of redox reactions are:
Decomposition Reaction
Combination Reaction
Displacement Reaction
Disproportionation Reactions