Redox Reactions And Electrochemistry Ques 507

Question: Which of the following is redox reaction [CBSE PMT 1997]

Options:

A) $ H_2SO_4 $ with $ NaOH $

B) In atmosphere, $ O_3 $ from $ O_2 $ by lightning

C) Evaporation of $ H_2O $

D) Nitrogen oxides form nitrogen and oxygen by lightning

Show Answer

Answer:

Correct Answer: D

Solution:

$ \overset{0}{\mathop{2N_2}},+\overset{0}{\mathop{O_2}},\to \overset{,}{\mathop{\overset{+2}{\mathop{2N}}\overset{-2}{\mathop{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.



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