The correct shape and I-I-I bond angles respectively in ion are :
Option: 1 Trigonal planar ; 120o
Option: 2 Distorted trigonal planar; 135o and 90o
Option: 3 T- shaped; 180o and 90o
Option: 4 Linear ; 180o
The structure of the tri-iodide ion is given as
It is linear having and I-I-I bond angle of
Hence, the correct answer is Option (4)
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