The first, second and third ionisation energies (E1,E2 and E3) for an element are.7 eV, 12.5 eV and 42.5 eV respectively. The most stable oxidation state of the element will be:
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a
+1
b
+4
c
+3
d
+2
answer is D.
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Detailed Solution
There is large gap (> 11eV) between second and third ionisation energies. So, most stable oxidation state of the element will be +2 .