Which of the following orders of lattice energy are correctly matched? — Chemical Bonding Chemistry Question

💡 Solution & Explanation

Lattice energy $\propto \frac{Z^+Z^-}{r^+ + r^-}$. A: Size increases down the group, so LE decreases. B: Charges increase (1x1 to 2x2 to 3x3), so LE increases. C: Charges increase (1x1 to 2x1 to 3x1), so LE increases. D is incorrect because size decreases up the group, meaning $KCl > RbCl > CsCl$.