Potassium dichromate $(K_2Cr_2O_7)$ is used . . . . . . .

  • A
    as a reducing agent
  • B
    in electroplating
  • C
    as an insecticide
  • D
    as an oxidizing agent to oxidize ferrous ions $(Fe^{2+})$ into ferric ions $(Fe^{3+})$ in acidic media.

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