MHT CET 2023 Chemistry question

Chemistry Classification of Elements and Periodicity in Properties MHT CET 2023

Which from following series of elements is correctly arranged according to their decreasing order of ionization enthalpy ()?

(A)Zn > Fe > Cr > ScCorrect
(B)Cr > Fe > Zn > Sc
(C)Sc > Fe > Cr > Zn
(D)Cr > Zn > Sc > Fe

Answer: (A)

Solution

Across the 3d series the first ionization enthalpy generally increases with nuclear charge, though with irregularities. Experimental (kJ/mol): Zn 906, Fe 762, Cr 653, Sc 633. Zn is highest because of its fully filled stable

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Question ID VK-097894