MCQ
The oxidation state of Cr in CrO5, is:
- A+10
- B+5
- C+6
- D+3
Explanation:

There are two Peroxide linkage
$\text{O}^{2-}_2$$\because$ Oxidation state is x - 1 - 1 - 1 - 1 - 2 = 0
x = +6
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$M(s) \to M(g)\,\,\,\,\,\,\,\,\,\,\,\,\,\, ........(1)$
$M(s) \to M^{2+} (g) + 2e^-\,\,\,\,\,\,\,\,.......(2)$
$M(g) \to M^+(g) + e^-\,\,\,\,\,\,\,\,\,\,\,.........(3)$
$M^+ (g) \to M^{2+} (g) + e^-\,\,\,\,\,\,\,\,\,.........(4)$
$M(g) \to M^{2+} (g) +2e^-\,\,\,\,\,\,\,\,\,\,\,..........(5)$
The second ionization energy of $M$ could be calculated from the energy values assoclated with