MCQ
$CrO_4^{-2}$ (Yellow) changes to $Cr_2O_7^{-2}$ (orange) in $pH = x$ and vice verses in $pH = y$, hence $x$ and $y$ are respectively
- A$6, 5$
- B$8,6$
- ✓$6,8$
- D$7,7$
✓
Answer
Correct option: C.
$6,8$
c
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