Question

24. Select the correct statements:
1) The heat of hydration of the dipositive alkaline earth metals ions
increase with an increase in their ionic size.
2) Hydration of alkali metal ions is less than that of IIA
3) Alkaline earth metal ions, because of their much larger charge to size
ratio exert a much stronger electrostatic attraction on the oxygen of
water molecule surrounding them.
4) Melting point of sodium halides follow order NaF > NaCl > NaBr > Nal​

Answer 1

Answer:

option 4

Explanation:

Melting point of sodium halides follow order as: NaF > NaCl > NaBr > Nal.

This is because, with the decrease in the electro-negativity of the halogen, the lattice energy decreases from NaF (910 kJ/mole) to NaI (682 kJ/mol).

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