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Question

Which of the following has maximum lattice energy?

A
Li2O
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B
Na2O
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C
MgO
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D
BaO
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Solution

The correct option is C MgO
The lattice energy depends on the attraction between the oppositely charged ions.

Lattice energy oxidation state of ionssize of ions

(+2) oxidation state containing ions have more lattice energy and also ionic size of the given metal ion follows the order: Ba2+>Na+>Li+>Mg2+

Mg2+ ion is smallest in size and thus has highest lattice energy.

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