SSC
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Sodium fluoride has a high melting and boiling point because ____
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strong van der waals forces between molecules
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weak van der waals forces between molecule
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the ions are held by strong electrostatic forces
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hydrogen bond exist in the molcules
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Explanation:
Detailed explanation-1: -"why does magnesium fluoride have a higher melting point than sodium chloride?” also, due to have a larger nuclear charge than soidum, with 1 more proton, the effective nuclear charge on the fluorine atoms is larger, so yet again more energy is required to break the bonds.
Detailed explanation-2: -The complete transfer of electron/charge takes place in the formation of an ionic bond. Hence, the anions and the cations are bonded or held together in a lattice structure by strong electrostatic forces of attraction which requires large amount of energy to break.
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