MCQ
In acidic medium, $\ce{K_2Cr_2O_7}$ shows oxidising action as represented in the half reaction $\ce{Cr_2O_7^{2-} + XH^{+} + Ye^{-} \rightarrow 2 A + ZH_2O, X , Y , Z}$ and $A$ are respectively are:
- A$8,6,4$ and $Cr _2 O _3$
- B$14,7,6$ and $Cr ^{3+}$
- C$8,4,6$ and $Cr _2 O _3$
- D$14,6,7$ and $Cr ^{3+}$
