The correct order of $'S-O'$ bond length is
The correct order of $'S-O'$ bond length is
- A
$SO^{2-}_3 > SO^{2-}_4 > SO_3 > SO_2$
- B
$SO^{2-}_3 > SO^{2-}_4 > SO_2 > SO_3$
- C
$SO^{2-}_4 > SO^{2-}_3 > SO_2 > SO_3$
- D
$SO^{2-}_4 > SO^{2-}_3 > SO_3 > SO_2$
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A molecule may be represented by three structures having energies $E_1 , E_2$ and $E_3$ , respectively. The energies of these structures follow the order $E_3 < E_2 < E_1$ , respectively. If the experimental bond energy of the molecule is $E_0$ , the resonance energy is
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