1
WB JEE 2017
MCQ (Single Correct Answer)
+1
-0.25
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The number of unpaired electrons in $${[NiC{l_4}]^{2 - }}$$, $$Ni{(CO)_4}$$ and $${[Cu{(N{H_3})_4}]^{2 + }}$$ respectively are
A
2, 2, 1
B
2, 0, 1
C
0, 2, 1
D
2, 2, 0
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