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Assertion : Ozone in the troposphere is ...

Assertion : Ozone in the troposphere is a product of ultraviolet radiations acting on dioxygen molecules.
Reason : Ozone is thermodynamically very stable.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the c orrect explanation of assertion.

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

AI Generated Solution

The correct Answer is:
To analyze the given assertion and reason regarding ozone, we will break down the statements step by step. ### Step 1: Understanding the Assertion The assertion states that "Ozone in the troposphere is a product of ultraviolet radiations acting on dioxygen molecules." - **Analysis**: Ozone (O3) is indeed formed when dioxygen (O2) molecules are subjected to ultraviolet (UV) radiation. However, the assertion incorrectly specifies that this occurs in the troposphere. In reality, ozone is primarily found in the stratosphere, where it plays a crucial role in absorbing UV radiation. ### Step 2: Understanding the Reason The reason states that "Ozone is thermodynamically very stable." - **Analysis**: While ozone is relatively stable compared to other reactive oxygen species, it is not thermodynamically very stable. Ozone can decompose back into dioxygen (O2) and nascent oxygen (O) under certain conditions, especially in the presence of UV light or heat. This indicates that ozone is not as stable as the reason suggests. ### Conclusion Both the assertion and the reason are false: - The assertion is false because ozone is primarily found in the stratosphere, not the troposphere. - The reason is false because ozone is not thermodynamically very stable; it can decompose under certain conditions. ### Final Answer Both the assertion and the reason are false. ---
To analyze the given assertion and reason regarding ozone, we will break down the statements step by step. ### Step 1: Understanding the Assertion The assertion states that "Ozone in the troposphere is a product of ultraviolet radiations acting on dioxygen molecules." - **Analysis**: Ozone (O3) is indeed formed when dioxygen (O2) molecules are subjected to ultraviolet (UV) radiation. However, the assertion incorrectly specifies that this occurs in the troposphere. In reality, ozone is primarily found in the stratosphere, where it plays a crucial role in absorbing UV radiation. ### Step 2: Understanding the Reason ...
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