Which of the following involves a redox reaction?a)Reaction of H2SO4 with NaOHb)Production of ozone from oxygen in the atmosphere by lightningc)Production of nitrogen oxides from nitrogen and oxygen in the atmosphere by lightningd)Evaporation of waterCorrect answer is option 'C'. Can you explain this answer?

Question

Answer

•The 1st reaction is acid base reaction which does not involve either oxidation or reduction.

•O3 formation from O2 does not involve either oxidation or reduction.

•Nitrogen oxides from N2 and O2 involves oxidation of nitrogen and reduction of oxygen.

For example, N2 + O2---> NO2.
• Evaporation of H2O is a physical change and is not a chemical change.

Hence answer is C.

Answer

Coz nitrogen & oxygen both have 0 redox value and in nitrogen oxide nitrogen will be + and oxygen will be -
So one nitrogen is oxidised and oxygen is reduced. Hence redox

Answer

Redox Reaction
A redox (reduction-oxidation) reaction involves the transfer of electrons between two species. The species that loses electrons is oxidized, while the species that gains electrons is reduced. In a redox reaction, there is always a simultaneous oxidation and reduction occurring.

Options:
a) Reaction of H2SO4 with NaOH: This is not a redox reaction. It is a neutralization reaction where sulfuric acid (H2SO4) reacts with sodium hydroxide (NaOH) to form water and sodium sulfate. No electron transfer occurs.

b) Production of ozone from oxygen in the atmosphere by lightning: This is not a redox reaction. Ozone production from oxygen in the atmosphere by lightning involves the breaking of O2 molecules and the formation of O3 molecules. It is a chemical reaction that does not involve electron transfer.

c) Production of nitrogen oxides from nitrogen and oxygen in the atmosphere by lightning:
This is a redox reaction. Lightning can cause a reaction between nitrogen (N2) and oxygen (O2) in the atmosphere, leading to the formation of nitrogen oxides (NOx). The reaction involves the transfer of electrons. Specifically, oxygen gains electrons and is reduced, while nitrogen loses electrons and is oxidized.

The overall reaction can be represented as:
N2 + O2 -> 2NO (nitric oxide)

During this process, nitrogen is oxidized from its elemental state (N2) to form nitrogen oxide (NO), and oxygen is reduced from its elemental state (O2) to form nitric oxide (NO).

The nitrogen oxide produced can further react with oxygen in the atmosphere to form other nitrogen oxides, such as nitrogen dioxide (NO2) and dinitrogen trioxide (N2O3), through additional redox reactions.

Thus, the production of nitrogen oxides from nitrogen and oxygen in the atmosphere by lightning involves a redox reaction.

d) Evaporation of water: This is not a redox reaction. Evaporation is a physical process where water molecules gain enough energy to escape from the liquid phase and enter the gas phase. No chemical reaction or electron transfer occurs during evaporation.

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