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Match the lists I and II and pick the correct matching from the codes give below.

List-I
(complex) List-II
(structure and Magnetic moment)
A ${[A g {(C N)}_{2}]}^{-}$ 1 square planar and 1.73 BM
B ${[C u {(C N)}_{4}]}^{3 -}$ 2 Linear and zero
C ${[C u {(C N)}_{6}]}^{4 -}$ 3 Octahedral and zero
D ${[C u {(N H)}_{3})_{4}]}^{2 +}$ 4 tetrahedral and zero
E ${[F e {(C N)}_{6}]}^{4 -}$ 5 octahedral and 1.73BM
A B C D E
1 2 4 5 1 3
2 5 4 1 3 2
3 1 3 4 2 5
4 4 5 2 1 3

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answer is A.

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Detailed Solution

${[A g {(C N)}_{2}^{}]}^{-} 2 x - 2 = - 1 \Rightarrow$
$x = + 1 A g^{+} - 5 s^{°}, 4 d^{10} n = 0 μ = 0$
${[C u {(C N)}_{4}^{}]}^{3 -} 4 x - 4 = - 3 \Rightarrow x = + 1$
$C u^{+} - 4 s °, 3 d^{10} n = 0 μ = 0, s p^{3}, t e t r a h y d r a l$
${[C u {(C N)}_{6}]}^{4 -} 6 x - 6 = - 4 \Rightarrow x = + 2$
$C u^{+ 2} - 4 s °, 3 d^{9}; n = 1 octahydral s p^{3} d^{2}$
$μ = 1.73 B M$
${[C u {(N H_{3})}_{4}^{}]}^{2 +} 4; x + 0 = + 2 \Rightarrow x = 2$
$C u^{+ 2} - 4 s °, 3 d^{9}, d s p^{2}, s q p l a n a r n = 1$
$μ = 1.73 B M$
${[F e {(C N)}_{6}]}^{4 -} 6 x - 6 = - 4 \Rightarrow x = 2,$
$F e^{+ 2} - 4 s °, 3 d^{6}, C N^{-}$ strongfield
$d^{2} s p^{3}, t_{2} g^{6} e g^{0}, n = 0, μ = 0$ octahydral

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