1.

Which of the following pairs has the same size ?

Answer»

`Zr^(4+), HF^(4+)`
`ZN^(2+), Hf^(4+)`
`FE^(2+), NI^(2+)`
`Zr^(4+), Ti^(4+)`

Solution :`Zr^(4+) and Hf^(4+)` have similar ionic radii due to lanthaniod contraction.


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