Assign $A$,$B$,$C$,$D$ from the given type of reaction.
$K_2[Cd(CN)_4] + H_2S \longrightarrow CdS \downarrow + 2KCN + 2HCN$

  • A
    For precipitate formation reaction
  • B
    For precipitate dissolution reaction
  • C
    For precipitate exchange reaction
  • D
    For no reaction

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