Q.

Among the species CO2⋅CH3COO−,CO,CO32−. HCHO which has the weakest carbon-oxygen bond

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a

CO2

b

CH3COO−

c

CO

d

CO32−

answer is D.

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Detailed Solution

Among the given species. The bond dissociation of C-O bond is minimum in case of CO32−by C - O bond become more weaker in CO32− or bond order of CO32− (1.33) is minimum so the become weaker.
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Among the species CO2⋅CH3COO−,CO,CO32−. HCHO which has the weakest carbon-oxygen bond