JEE Main · 2023 · Shift-ImediumGOC-073

Resonance in carbonate ion (CO₃²⁻): Which is true?

General Organic Chemistry (GOC) · Class 11 · JEE Main Previous Year Question

Question

Resonance in carbonate ion (CO₃²⁻): image Which is true?

Options
  1. a

    It is possible to identify each structure individually by some physical or chemical method

  2. b

    All these structures are in dynamic equilibrium with each other

  3. c

    Each structure exists for equal amount of time

  4. d

    CO₃²⁻ has a single structure i.e., resonance hybrid of the above three structures

Correct Answerd

CO₃²⁻ has a single structure i.e., resonance hybrid of the above three structures

Detailed Solution

Understanding Resonance in \ceCO32\ce{CO3^{2-}} Resonance is a hypothetical concept and exists only on paper. It involves the delocalization of electrons within a molecule. The individual Lewis structures (canonical forms) are not real.

  • Option D: The actual structure of the carbonate ion is a single, stable resonance hybrid of all three contributing structures, where all COC-O bonds are of equal length.

Answer: (d)\boxed{\text{Answer: (d)}}

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