Q14 / 14 · NTA Abhyas (JEE Main) 2020 · Chemistry · Practical Chemistry

Passing H2S in to a mixture of Mn2+,Ni2+,Cu2+ and Hg2+ ions in an acidified aqueous solution precipitates

  • A
    MnS and CuS
  • Correct answer
    B
    CuS and HgS
  • C
    NiS ad HgS
  • D
    MnS and NiS

Solution

H2S in presence of aqueous solution precipitates sulphide of Cu and Hg (IInd group) apart from Pb+2,Bi+3,Cd+2,As+3,Sb+3 and Sn+2, Mn2+,Ni2+ are of IVth group so cannot be precipitated by H2S .

Hence, the correct answer is option: 'B'.

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