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Q.

Successive first five ionisation energies of a particular element is 7.1, 14.3, 34.5, 46.8, 162.2 (in eV) respectively. The element is likely to be :

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a

Na

b

Si

c

F

d

Ca

answer is B.

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Detailed Solution

High jump between IE4 and IE5∴ no. of valance =4 Gen. confi. ns2np2∴ element =Si
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