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Q.

Kinetic energy of electron in a mono electronic species is +1312kJ/mole. Then which of the following statements are correctI) The electron is present in the 2nd orbit of He+ ionII) The electron is present in the 2nd orbit of H atomIII) The electron is present in the 3rd orbit of Li+2 ionIV) The electron is present in the 4th orbit of He+ ion

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a

I and II

b

II and III

c

I and III

d

III and IV

answer is C.

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Detailed Solution

Given KE = 1312 KJ/moleIt means T.E = - 1312KJ/moleE2 of He+=-Z2n2E1                =-2222E1(1312)                 = -1312 KJ/moleKE of electron in 2nd orbit of He+ = +1312 KJ/mole                 =-3232(1312)                 = -1312 KJ/moleKE of electron in 3rd orbit of Li+2 = +1312 KJ/mole
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