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Q.

Which of the following complexes has the highest stability constant at 298 K?

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a

[CdCl4]2–

b

[CdBr4]2–

c

[Cdl4]2–

d

[Cd(CN)4]2–

answer is D.

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Detailed Solution

  • [Cd(CN)4] At 298 K, complex 2 has the highest stability constant. 
  • Cyano and ammine complexes are far more stable than halide ion complexes. 
  • This is because NH3 and CN are more powerful Lewis bases.
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