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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 : `CO_(2) ` is resonance stabilized molecule.
R : Bond length of C-O I `CO_(2)` is intemediate of single and double bond length.

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 solve the question, we need to evaluate the assertion (A) and the reason (R) provided: ### Assertion (A): **CO₂ is a resonance-stabilized molecule.** ### Reason (R): **The bond length of C-O in CO₂ is intermediate of single and double bond lengths.** ### Step-by-Step Solution: 1. **Understanding Assertion (A):** - Carbon dioxide (CO₂) can be represented by multiple resonance structures. - The primary resonance structures involve a double bond between carbon and each oxygen atom. - However, there are also structures where one oxygen has a single bond and carries a negative charge, while the other oxygen has a triple bond with a positive charge on carbon. - This delocalization of electrons leads to resonance stabilization, making the assertion true. 2. **Evaluating Reason (R):** - The bond lengths in CO₂ need to be compared to typical bond lengths of C-O single and double bonds. - In CO₂, the C-O bond length is closer to that of a double bond due to the resonance structures, but it is not exactly intermediate between single and double bond lengths. - In fact, the bond length of C-O in CO₂ is shorter than a typical C-O single bond but slightly longer than a C=O double bond. - Thus, the reason provided is misleading as it incorrectly states the relationship of the bond lengths. 3. **Conclusion:** - Since the assertion is true (CO₂ is resonance-stabilized), but the reason is false (the bond length is not intermediate between single and double), we conclude that: - The correct answer is **Option 3: Assertion is true but reason is false.**
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