Assertion : The experimentally determined carbon to oxygen bond length in carbon dioxide is 115 pm. Reason :The lengths of a normal carbon to oxygen double bond(C=O) and carbon to oxygen triple bond (C-=) are 121 pm and 110 pm respectively.

Assertion : The experimentally determined carbon to oxygen bond length

1.	Assertion : The experimentally determined carbon to oxygen bond length in carbon dioxide is 115 pm. Reason :The lengths of a normal carbon to oxygen double bond(C=O) and carbon to oxygen triple bond (C-=) are 121 pm and 110 pm respectively.
Answer» If both ASSERTION and reason are TRUE and reason is the correct explanation of assertion. If both assertion and reason are true but reason in not the correct explanation of assertion. If assertion is true but reason is false. If both assertion and reason are false. Solution :In carbon dioxide, the carbon - oxygen bond LENGTHS lie in between the values for (C = O) and `(C-= O)` bond lengths because carbon dioxide is a resonace hybrid of following STRUCTURES : `underset(I)( :overset(..)(O) ::C::overset(..)(C): ) harr underset(II)( :underset(..)overset(..^(-))(O: )C vdots vdotsoverset(+)(O): ) harr underset(III)( :overset(+)(O)vdots vdots C :underset(..)overset(..^(-))(O: ))`