When $H_2S$ gas is passed through a solution,it reacts to form a white precipitate. Which ion is present in the solution?

  • A
    Lead $(Pb^{2+})$
  • B
    Zinc $(Zn^{2+})$
  • C
    Copper $(Cu^{2+})$
  • D
    Nickel $(Ni^{2+})$

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