Question

Peroxide bonds present in (CrO8)-2

Answer 1

The question seems to be incomplete. So, I am giving an assumed answer.

The number of peroxide bonds in K₃CrO₈ is - 4 linkages.

The number of peroxy linkages in a compound can be calculated by using the formula = (Theoretical Oxidation number) - (Maximum Oxidation number) / 2.

But for the theoretical O.S of Cr⁻ in K₂CrO₈ will be = 16 - 3 = 13 

The maximum number of linkages in the structure [CrO₈]⁻³ are = 5

Therefore, the number of peroxy linkages according to the formula can be calculated as = (13 - 5)/2 = 4

Therefore, the number of peroxide bonds in K₂CrO₈ is = 4