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Q.

Reaction of [Ni(CN)₄]²⁻ with metallic potassium in liquid ammonia at −33C yields complex X. The geometry and magnetic behavior of X, respectively, are:

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a

Octahedral and paramagnetic

b

Tetrahedral and diamagnetic

c

Square pyramidal and paramagnetic

d

Square planar and diamagnetic

answer is B.

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Detailed Solution

${[N i {(C N)}_{4}]}^{- 2} \to_{- 33^{0} C}^{K / l i q . N H_{3}} K_{2} [N i {(C N)}_{4}]$

$K_{2} [N i {(C N)}_{4}] - t e t r a h e d r a l a n d d i a m a g n e t i c$

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