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The first ionisation enthalpy of Na, Mg and Si are 496, 737 ,776 kJ/mol respectively. What will be the first ionisation enthalpy potential of Al in kJ/mol?(a) > 766 kJ/mol(b) > 496 and < 737 kJ(c) >737 and < 766 kJ/mol(d) > 496 kJ/mol |
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Answer» Correct option (b) > 496 and < 737 kJ Explanation: The ionisation enthalpy of Al is lower than that of Mg as 3p1 electron of Al is easier to remove than to remove an electron from fully-filled 3s-orbital of Mg. |
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