Cu^ 2+ has a stronger polarising power than that of Ca^ 2+ because

MHT CET Chemistry question

has a stronger polarising power than that of because

(A) ion is smaller than ionCorrect
(B) ion has inert gas configuration whereas ion does not
(C)copper shows variable valency, calcium does not
(D) ion is smaller than ion and the d-electrons in ion shield the nucleus poorly

Answer: (A)

For equal charge, the smaller (about 73 pm against about 100 pm for ) has the higher charge

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Question ID VK-074884