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Coordination Compounds — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryCoordination Compounds1 Mark
MCQ
When $\text{KCN}$ is added to $\ce{CuSO_4}$ solution, there is formation of the stable water soluble complex. This complex is:
  • A
    $\ce{K_4[Cu(CN)_6]}$
  • ✓
    $\ce{K_3​[Cu(CN)_4]}$
  • C
    $\ce{K_2​[Cu(CN)_4]}$
  • D
    $\ce{K[Cu(CN)_3​]}$
✓

Answer

Correct option: B.
$\ce{K_3​[Cu(CN)_4]}$
When $\text{KCN}$ is added to $\ce{CuSO_4}$​ solution, the following reaction occurs.
$\ce{4KCN+CuSO_4 \rightarrow K_3​[Cu(CN)_4].}$

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