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QAIPM-2000-Ch-2973: NEET 2000 Chemistry - Class 12 AIPM-2000-Ch-2973 Solution: In quantitative analysis of second group in laboratory,…

In quantitative analysis of second group in laboratory, H2SH_2S gas is passed in acidic medium for precipitation. When Cu2+Cu^{2+} react with KCN, then for product, true statement is

Multiple Choice Options

  • A K2[Cu(CN)4]K_2[Cu(CN)_4] more soluble
  • B K2[Cd(CN)4]K_2[Cd(CN)_4] less stable
  • C K2[Cu(CN)2]K_2[Cu(CN)_2] less stable
  • D K2[Cd(CN)3]K_2[Cd(CN)_3] more stable

Step-by-Step Verified Solution

K 3 [Cu(CN) 2 ] = 3(+1)+x+2(-1) = 0 _ x = -1 _ the oxidation no. of 'Cu' is -1 (-ve), so this complex is unstable so it is not formed.

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