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Which of the following ions do not exist...

Which of the following ions do not exist?
`(i) B^(3+)`
`(ii) Al^(3+)`
`(iii) Ga^(3+)`
`(iv) Tl^(3+)`

A

`(i), (ii), (iii), (iv)`

B

`(i), (ii), (iii)`

C

`(ii), (iii)`

D

`(i), (iv)`

Text Solution

Verified by Experts

The correct Answer is:
D
`B^(3+)` ion does not exist because the sum of first three ionization enthalpies is very high. `Tl^(3+)` does not exist because `E^(@) (Tl^(3+)//Tl)` is `+ve`, i.e., `Tl(+3)` is a strong oxidizing agent.
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