MCQ
In electroplating, the metal that is not used for plating is
- ✓$Fe$
- B$Zn$
- C$Ni$
- D$Au$
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(Given atomic masses of $A=64 ; B=40 ; C=32 u$ )
${K_2}Cr_2{O_7}/{H^ + } + y \to \mathop {C{r^{ + 3}} + Others}\limits_{(green)\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} $