Chemistry
Assertion (A): The formation of ozone involves a chemical reaction called photolysis.
Reason (R): The highly energetic ultraviolet radiation from the sun breaks the oxygen molecules into oxygen atoms. Oxygen atoms then react with oxygen molecules to form ozone.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
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Answer
Both A and R are true and R is the correct explanation of A.
Explanation— The formation of ozone involves a chemical reaction called photolysis. High energy ultra-violet radiation, also known as far UV, helps in breaking oxygen molecules into oxygen atoms.
O2 + UV light ⟶ 2O
Oxygen atom then reacts with oxygen molecules to form ozone.
O + O2 ⟶ O3
Hence, both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
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