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Which of the following pair of complexes have the same EAN of the central metal atoms /ions?

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$[Cu {({NH}_{3})}_{4}] {SO}_{4} and K_{3} [Fe (CN)_{6}]$

$K_{4} [Fe (CN)_{6}] and [Co {({NH}_{3})}_{6}] {Cl}_{3}$

$K_{3} [Cr {(C_{2} O_{4})}_{3}] and [Cr {({NH}_{3})}_{6}] Cl {({NO}_{2})}_{2}$

all of these

answer is D.

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Detailed Solution

$(a) EAN of {Cu}^{2 +} = 35 EAN of {Fe}^{3 +} = 35 (b) EAN of {Fe}^{2 +} = 36 EAN of {Co}^{3 +} = 36 (c) EAN of {Cr}^{3 +} = 33$

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