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\(\text{H}_3\text{PO}_3\) can be represented by structures 1 and 2 shown below.

However, these two structures cannot be considered as canonical forms of a resonance hybrid because:

1.	The positions of the atoms are different in each structure.
2.	The positions of the atoms remain unchanged.
3.	\(\text{H}_3\text{PO}_3\) does not show resonance.
4.	Two hydrogen atoms are missing.

Subtopic: Resonance & Nature of Compounds |

64%

Level 2: 60%+

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The number of resonating structures exhibited by \(CO^{2-}_3\) ion are :

1.	2	2.	3
3.	4	4.	5

Subtopic: Resonance & Nature of Compounds |

81%

Level 1: 80%+

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