Lattice energy of an ionic crystal depends on:
ACharges of ions and inter-ionic distance
BTemperature only
CNumber of moles
DColor of ions
Answer & Solution
Correct answer: A. Charges of ions and inter-ionic distance
Lattice energy ∝ (q⁺ × q⁻)/r. Higher charges and smaller ions give more lattice energy (more stable crystal). E.g. MgO (both ions ±2) has much higher lattice energy than NaCl (both ions ±1).
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