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If I2 is dissolved in aqueous KI, the in...

If `I_2` is dissolved in aqueous KI, the intense yellow species `I_3^` is formed. The structure of `I_3^-` ion is

A

Square pyramidal

B

Trigonal bipyramidal

C

Octahedral

D

Pentagonal bipyramidal

Text Solution

Verified by Experts

The correct Answer is:
B
Total no. of valence electron in `I_(3)^(-) = 7 xx 3+1= 22`.
In tri-iodide ion, the central iodine atom is `sp^(3)d` hybridised in which the equatorial positions are occupied by lone pairs and the axial positions by iodine. Hence the structure is linear.
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