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Examine the following resonating structu...

Examine the following resonating structures of formic acid for their individual stability and then answer the question given below.
`underset("I ")(H-overset(O)overset(||)C-OH)harrH-underset(II)overset(O^(-))overset(|)C=overset(-)O-HharrH-underset(III)overset(O^(-))overset(|)(C^(+))-OHharrH-underset(IV)overset(O^(+))overset(|)(C^(-))-OH`
Which of the following arrangements gives the correct order of decreasing stability of the above-mentioned resonance contributors?

A

`II gt I gt III gt IV`

B

`I gt II gt III gt IV`

C

`IV gt III gt I gt II`

D

`IV gt III gt I gt II`

Text Solution

Verified by Experts

The correct Answer is:
B
`underset("complete octet neutral")underset("More covalent bond")(I)gtunderset("complete octet")underset("More covalent bond")(II)gtunderset("stability")underset(O^(Theta)gtC^(Theta))underset("incomplete octet")underset("Less covalent bond")(III) gt underset("C - atom")underset("less electronegative")underset("negative charge on")underset("O-atom and ")underset("electronegative")underset("on highly")underset("Positive charge")(IV)``
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