Question

Which statement is incorrect.
(1) the energy of actual structure of the molecule is
lower than that of any canonical structure
(2) The energy difference between actual structure
and least energy resonance structure is called
as resonance energy
(3) More number of resonating structure, more
resonance
(4) In equivalent resonance structure of acetate ion
of C=O bond length are unequal​

Answer 1

4. In equivalent resonance structure of acetate ion of the c =o bond length are unequal

Answer 2

Answer:

In equivalent resonance structure of acetate ion of C=O bond length are unequal​. This is the incorrect statement.

Explanation:

When a single Lewis structure cannot describe all properties of a molecule, a number of structures of similar energy, positions of nuclei, bonding and non-bonding pairs of electrons are written to describe all properties. The actual structure is in between all these contributing structures and is known as a resonance hybrid and the different individual structures are termed as resonating structures or canonical forms. This is called resonance.

• The resonating structures are more stable than the actual molecule. The lower the energy, the greater will be the stability. Thus, the energy of the actual structure of the molecule is lower than that of any canonical structure.
• The energy difference in the energy of the resonance hybrid and the most stable contributing structure(having the least energy) is called resonance energy.
• More resonating structures, more will be the stability.
• In equivalent resonance structure of acetate ion of C=O bond length are equal​.