A) Cu and Cr
B) Cu and Se
C) Cu and Zn
D) Sc and Zn
Correct Answer: D
Solution :
[d] Sc \[(3{{d}^{1}}4{{s}^{2}})\] has 631 kJ \[mo{{l}^{-1}}\] and \[Zn(3{{d}^{10}}4{{s}^{2}})\] has \[906kJ\,mo{{l}^{-1}}\]
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