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Arrange NaCl, CaCl2 and AlCl3 in increasing order of lattice enthalpy (positive value).

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Arrange NaCl, CaCl2 and AlCl3 in increasing order of lattice enthalpy (positive value).

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Compounds having cations with higher charge have large lattice enthalpy (higher positive value) than compounds having cations with lower charge.

Hence,

The correct order is NaCl < CaCl2 < AlCl3.

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