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Q.

The ionization energy of H atom is 21.79×10−19J. Then the value of binding energy of second excited tate of Li2+ ion :

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a

21.79×10−19J

b

13×21.79×10−19J

c

32×21.7×10−19J

d

132×21.79×10−19J

answer is B.

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Detailed Solution

Binding energy of the given atom;

21.79×10−19×3232J

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