Q.
The size of the following species increases in the order
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a
Mg2+< Na+ < F−< Al
b
F− < Al < Na+ >Mg2+
c
Al < Mg
d
Na+
answer is A.
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Detailed Solution
Mg2+< Na+< F−< Al F− has bigger size than Mg2+ and Na+due to small nuclear charge.
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