1.

The correct order of ionic radii of Y^(3+) ,La^(3+), Eu^(3+)and Lu^(3+) is

Answer»

`Y^(3+) LT LA^(3+) lt EU^(3+) ltLu^(3+)`
`Lu^(3+) lt Y^(3+) lt Eu^(3+) lt La^(3+)`
`Lu^(3+) ltEu^(3+) lt La^(3+) lt Y^(3+)`
`La^(3+) lt Eu^(3+) lt La^(3+) lt Y^(3+)`

Solution :
Thus, `Lu^(3+) lt Y^(3+) lt Eu^(3+) LTLA^(3+)`


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