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Question

IP1 and IP2 of Mg are 178 and 348 Kcal mol1. The energy required for the reaction MgMg2++2e is

A
+170Kcal mol1
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B
+526Kcal mol1
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C
170Kcal mol1
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D
526Kcal mol1
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Solution

The correct option is B +526Kcal mol1
For this reaction we need to supply energy equivalent to both the IP's.
And as we know that ionisation potential is an extensive property means which have additive nature so
total energy =IP1+IP2
=178Kcal mol1+348Kcal mol1
= +526Kcal mol1

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