ElectrochemistryHard

Question

The oxidation number of Cr in K₂Cr₂O₇ is :

Options

A.+ 3

B.- 3

C.+6

D.-6

Solution

oxidation number of Cr in K₂ Cr₂O₇
2 + 2 × x - 2 × 2 = 0
x = = + 6

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