Question

The correct order of increasing C-O bond length of CO, CO32-, CO2 is:

• A. (A) CO32-<CO2 <CO
• B. (B) CO2 < CO32- < CO
• C. (C) CO < CO32- <CO2
• D. (D) CO < CO2M < CO32-

Answer 1

Answer: (C)

(C) CO < CO32- <CO2

Answer 2

Explanation:
The order of C-O bond length in the given species can be determined by finding out the number of bonds between the constituent atoms.The structures of the given species are as follows:1. CO: C- ≡O+There is a triple bond between C and O atoms.2. CO2 : O≡C=OThere are two double bonds between C and O atoms.3. CO32-There is a single, as well as a double-bond, showed between C and O atoms.From the above structures, it is clear that bond order for the given compounds increases as:CO32-<CO2<COWe know that Bond Length ∝1bond orderThus, the increasing order of C-O bond length is:CO< CO2M<CO32-Hence, the correct option is (D).