This equation represents the preparation of gold sol: $2 AuCl_3 + 3 HCHO + 3 H_2 O \rightarrow 2 Au + 3 HCOOH + 6 HCl$. What type of reaction is this?

  • A
    Oxidation
  • B
    Reduction
  • C
    Double decomposition
  • D
    Hydrolysis

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