MCQ
Which of the following is correct ?
- ✓$CrO_4^{ - 2}\xrightarrow[{{P^H} = 8}]{{{P^H} = 4}}CrO_7^{ - 2}$
- B$I^-$ with $KMnO_4$ in acidic medium gives $\to IO_3^-$
- CMisch metal $=$ only formed by $Ce$
- D$+2\, O.S.$ shown by $= Ce,\, Tb$
✓
Answer
Correct option: A.
$CrO_4^{ - 2}\xrightarrow[{{P^H} = 8}]{{{P^H} = 4}}CrO_7^{ - 2}$
a
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