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In the following questions, a statement ...

In the following questions, a statement of assertion (A) is followed by a statement of reason (R )
A : `PCl_(5)` exist but `NCl_(5)` does not
R : Nitrogen is highly inert.

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 given statements, we will break down the assertion (A) and the reason (R) step by step. ### Step 1: Understanding the Assertion **Assertion (A):** "PCl₅ exists but NCl₅ does not." - **Explanation:** Phosphorus (P) can form PCl₅ because it has vacant d-orbitals that allow it to expand its octet and accommodate more than eight electrons. In contrast, nitrogen (N) does not have vacant d-orbitals and is limited to forming compounds that adhere to the octet rule. Therefore, NCl₅ does not exist. ### Step 2: Understanding the Reason **Reason (R):** "Nitrogen is highly inert." - **Explanation:** While nitrogen is indeed relatively inert due to its stable electronic configuration (1s² 2s² 2p³), this does not directly explain why NCl₅ does not exist. The reason for the non-existence of NCl₅ is primarily due to nitrogen's inability to expand its valence shell, not its inertness. ### Step 3: Evaluating the Truth of Assertion and Reason 1. **Is Assertion (A) true?** - Yes, PCl₅ exists due to phosphorus's ability to utilize d-orbitals, while NCl₅ does not exist. 2. **Is Reason (R) true?** - Yes, nitrogen is relatively inert, but this does not explain the non-existence of NCl₅. 3. **Does Reason (R) correctly explain Assertion (A)?** - No, the reason does not provide the correct explanation for the assertion. The non-existence of NCl₅ is due to nitrogen's electronic structure and its inability to expand its octet, not merely because it is inert. ### Conclusion - Both the assertion and the reason are true, but the reason is not the correct explanation for the assertion. Therefore, the correct answer is that both statements are true, but the reason does not explain the assertion. ### Final Answer **Both assertion and reason are true, but the reason is not the correct explanation of the assertion.** ---
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