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Dinesh khalmaniya 1
option C
Mercuric chloride exists not as a salt composed of discrete ions, but rather is composed of linear triatomic molecules, hence its tendency to sublime. In the crystal, each mercury atom is bonded to two chloride ligands with Hg—Cl distance of 2.38 Å; six more chlorides are more distant at 3.38 Å
NaCl is ionic crystal
BeCl2 forms coordinate bond
HF forms H bonding between crystals
so only Option C is correct. it's molecule are binded with VF of attraction