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A : Tailing of Hg caused by ozone is due...

A : Tailing of Hg caused by ozone is due to formation of HgO .
R : In the presence of `O_(3)` , Hg does not loses its meniscus .

A

If both Assertion & Reason are true and the reason is the correct explanation of the assertion , then mark (1)

B

If both Assertion & Reason are true but the reason is not the correct explanation of the assertion , then mark (2)

C

If Assertion is true statement but Reason is false , then mark (3)

D

If both Assertion and Reason are false statements , then mark (4)

Text Solution

AI Generated Solution

The correct Answer is:
To analyze the assertion and reason provided in the question, we will break down the information step by step. ### Step 1: Understand the Assertion The assertion states that the tailing of mercury (Hg) caused by ozone (O3) is due to the formation of mercury oxide (HgO). **Hint:** Consider what "tailing" means in this context and how it relates to the behavior of mercury when exposed to ozone. ### Step 2: Analyze the Reaction When mercury is exposed to ozone, it reacts to form mercurous oxide (Hg2O) rather than mercury oxide (HgO). The reaction can be represented as: \[ 2 \text{Hg} + \text{O}_3 \rightarrow \text{Hg}_2\text{O} + \text{O}_2 \] **Hint:** Look at the products of the reaction and identify the correct oxide formed. ### Step 3: Understand the Reason The reason states that in the presence of ozone (O3), mercury does not lose its meniscus. This implies that the meniscus remains intact despite the reaction occurring. **Hint:** Think about what happens to the physical properties of mercury when it reacts with ozone and how that affects the meniscus. ### Step 4: Evaluate the Assertion and Reason - The assertion is incorrect because the tailing of mercury is due to the formation of Hg2O, not HgO. - The reason is correct because the meniscus of mercury can be restored by shaking with water, indicating that it does not lose its meniscus permanently. **Hint:** Determine if both statements are true or false and how they relate to each other. ### Conclusion Based on the analysis: - Assertion (A) is **False**. - Reason (R) is **True**. Thus, the correct conclusion is that the assertion is not correct, but the reason is correct. ### Final Answer: Assertion is false, and reason is true. ---
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