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ChemistryJEE Main 22 Jan 2026, Shift 2·Q22·Numerical·Easy–moderate

Thermodynamics · Born haber cycle lattice enthalpy

If the enthalpy of sublimation of Li is 155 kJ mol−1^{-1}, enthalpy of dissociation of FX2\ce{F2} is 150 kJ mol−1^{-1}, ionization enthalpy of Li is 520 kJ mol−1^{-1}, electron gain enthalpy of F is −313-313 kJ mol−1^{-1}, standard enthalpy of formation of LiF is −594-594 kJ mol−1^{-1}. The magnitude of lattice enthalpy of LiF is kJ mol−1^{-1} (Nearest integer).

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See the full 22 Jan 2026, Shift 2 paper