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The ionization enthalpies of Li and Na a...

The ionization enthalpies of Li and Na are 520 KJ `mol^(-1)` and 495 KJ `mol^(-1)` respectively.The energy required to convert all the atoms present in 7 mg of Li vapours and 23 mg of sodium vapours of their respective gaseous cations respectively are

A

5200 J, 4950 J

B

4950 J, 5200 J

C

52 J, 49.5 J

D

495 J, 520 J

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The correct Answer is:
A
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