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5. Co-ordination chemistry — Chemistry STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceChemistry5. Co-ordination chemistry1 Mark
MCQ
$CuS{O_4}$ reacts with $KCN$  solution and forms:
  • ✓
    ${K_3}[Cu{(CN)_4}]$
  • B
    $Cu(CN)$
  • C
    $Cu{(CN)_2}$
  • D
    ${K_4}[Cu{(CN)_6}]$
✓

Answer

Correct option: A.
${K_3}[Cu{(CN)_4}]$
a
(a) $CuS{O_4}$ on reaction with $KCN$ gives ${K_3}[Cu{(CN)_4}]$
$2CuS{O_4} + 10KCN \to 2{K_3}[Cu{(CN)_4}] + 2{K_2}S{O_4} + {(CN)_2}$

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