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Lattice energy of `BeCO_(3)(I), MgCO_(3)(II)` and `CaCO_(3)(III)` is in order.A. `I gt II gt III`B. `III gt II gt I`C. `II gt III gt I`D. `III gt I gt II` |
Answer» Correct Answer - A All of the carbonates are of group `2` elements. Lattice energy decreases down the group `(darr)`. |
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