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Ionisation energies three hypothetical elements are given below (in kJ/mole) : `{:(,I,II,III),(X,122,340,1890),(Y,99,931,1100),(Z,118,1220,16552):}` W

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Ionisation energies three hypothetical elements are given below (in kJ/mole) :
`{:(,I,II,III),(X,122,340,1890),(Y,99,931,1100),(Z,118,1220,16552):}`
Which of the following is likely to be 2nd group element?
A. X
B. Z
C. Y
D. X and Y
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Correct Answer - A
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