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(A) In sodium formate, both C–O bonds have same bond length value 1.27 A^o.
(R) Equal bond length is due to indistinguishable canonical structures in formate ion.

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(A) is true but (R) is false

Both (A) and (R) are true but (R) is not the correct explanation of (A)

Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are false

answer is A.

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Detailed Solution

We need to find the correct option from the given options.

The carbon-oxygen bond lengths in sodium formate ion are equal because it is a resonance hybrid of two equivalent structures.

The resonance-exhibiting formate ion produces equal bond lengths.

Hence, Option A is correct.

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