Assertion- CO 2 is a resonance stabilized molecule- Reason- The bond length of C - O in CO 2 is in between the lengths of a single and a double bond-A- Both the assertion and the reason are true and the reason is the correct explanation of the assertion-B- Both the assertion and the reason are true but the reason is not the correct explanation of the assertion-C- The assertion is true but the reason is false-D- Both the assertion and the reason are false-

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Formal Charge

Assertion: CO...

Question

Assertion: $C O_{2}$ is a resonance stabilized molecule.
Reason: The bond length of $C - O$ in $C O_{2}$ is in between the lengths of a single and a double bond.

Both the assertion and the reason are true and the reason is the correct explanation of the assertion.

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Both the assertion and the reason are true but the reason is not the correct explanation of the assertion.

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The assertion is true but the reason is false.

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Both the assertion and the reason are false.

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Solution

The correct option is C The assertion is true but the reason is false.
When a molecule cannot be adequately described by a single
classical structure, the concept of resonance is often invoked.

Thus, $C O_{2}$ molecule is described as a resonance hybrid of the following structures:

The bond lengths in carbon dioxide molecule lies between those of a normal C-O double bond (121 pm) and a C-O triple bond (110 pm). It is around 115 pm in $C O_{2}$ . This can be explained by considering the hybrid of the resonance structures shown above.

Hence here, the assertion is true but the reason is not.

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Formal Charge

Standard XII Chemistry

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Assertion: CO2 is a resonance stabilized molecule. Reason: The bond length of C−O in CO2 is in between the lengths of a single and a double bond.

Assertion: $C O_{2}$ is a resonance stabilized molecule.
Reason: The bond length of $C - O$ in $C O_{2}$ is in between the lengths of a single and a double bond.