Q.
The first ionization energy (in kJ/mol) of Na, Mg, Al and Si respectively, are:
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a
496, 577, 737, 786
b
786, 737, 577, 496
c
496, 737, 577, 786
d
496, 577, 786, 737
answer is C.
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Detailed Solution
Ionisation energy of Al is less than both Mg and Si. So the order is 496,737,577,786.
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