Which of the following pairs is chemically di | vedclass

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(D) $Ca$ and $Zn$ are chemically dissimilar because $Ca$ belongs to the $s$-block (alkaline earth metal) with valence configuration $ns^2$,while $Zn$

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$Ca$ and $Zn$

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(D) $Ca$ and $Zn$ are chemically dissimilar because $Ca$ belongs to the $s$-block (alkaline earth metal) with valence configuration $ns^2$,while $Zn$ belongs to the $d$-block (transition metal) with valence configuration $(n-1)d^{10}ns^2$. $Na$ and $K$ are both alkali metals,$Ba$ and $Sr$ are both alkaline earth metals,and $Zr$ and $Hf$ exhibit lanthanoid contraction,making them chemically very similar.

Which of the following pairs is chemically dissimilar?

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