The correct set from the following in which both pairs are in correct order of melting point is o o o o (A) LiF LiCl ; NaCl MgO (B) LiCl LiF ; NaCl MgO (C) LiCl LiF ; MgO NaCl (D) LiF Li

Question

The correct set from the following in which both pairs are in correct order of melting point is o o o o

(A) LiF > LiCl ; NaCl > MgO
(B) LiCl > LiF ; NaCl > MgO
(C) LiCl > LiF ; MgO > NaCl
(D) LiF > LiCI ; MgO > NaCI

Prashant Kotian · Accepted Answer

Correct answer: D) LIF > LICI ; MGO > NACI. Lattice energy Lattice energy melting point Lattice energy : LiF > LiCl Lattice energy : MgO > NaCl M.Pt. of LiF = 845 C M.Pt. of LiCl = 605 C M.Pt. of NaCl = 801 C M.Pt. of MgO = 2852 C

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