MolSynapsequestion bank

MolSynapse / Question bank / Chemical Bonding / Resonance and multicentred bonding

JEE Advanced levelOne or more correct optionsDifficulty 3 of 3cb053

Which of the following statements about acetate ion and acetic acid are correct?

AThe two C-O bonds in $CH X_{3} COO X^{-}$ are equal in length
BIn $CH X_{3} COOH$ the C=O bond is shorter than the C-OH bond
CThe average C-O bond order in $CH X_{3} COO X^{-}$ is 2
DThe C-O bonds of $CH X_{3} COO X^{-}$ are shorter than the C-OH bond of $CH X_{3} COOH$

Answer: A, B, D

Acetate has two equivalent resonance forms, so both C-O bonds have order 1.5 and equal length. In the acid, the double bond is shorter than the single C-OH bond. Acetate bond order 1.5 is between 1 and 2, so the third statement is false; and its C-O bonds (order 1.5) are shorter than the single C-OH bond (order 1).

Practice Chemical Bonding More on Resonance and multicentred bonding

Previous questionNext question

More questions on Resonance and multicentred bonding