Arrange the following properties, as indicated, in the increasing order :
$L a t t i c e e n e r g y o f B e C l_{2}, M g C l_{2}, C a C l_{2}, S r C l_{2}$

B e C l_{2} > M g C l_{2} > C a C l_{2} > S r C l_{2}

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B e C l_{2} > S r C l_{2} > M g C l_{2} > C a C l_{2}

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B e C l_{2} > S r C l_{2} > C a C l_{2} > M g C l_{2}

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B e C l_{2} > C a C l_{2} > S r C l_{2} > M g C l_{2}

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Solution

The correct option is A $B e C l_{2} > M g C l_{2} > C a C l_{2} > S r C l_{2}$
Lattice energy is the amount of energy required to break one mole of solid salt into its ions.
In case of alkaline earth metal chlorides, the lattice energy decreases with increase in the size of the cation. The decreasing order of lattice energy of alkaline earth metal chlorides is $B e C l_{2} > M g C l_{2} > C a C l_{2} > S r C l_{2}$ .

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R a C l_{2} < B a C l_{2} < S r C l_{2} < C a C l_{2} < M g C l_{2} < B e C l_{2}

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