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 $\to IO_3^-$
  • C
    Misch 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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