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  4. Following steps are involved in manufacturing of potassium dichromate: <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/chemistry/66e463f781f62ac74eedca769317065e-.jpeg /> What is difference in the O.N. of Cr between X and Z?

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Q. Following steps are involved in manufacturing of potassium dichromate:
image
What is difference in the O.N. of $Cr$ between $X$ and $Z$?

The d-and f-Block Elements

Solution:

image
O.N. of Cr in $X(FeO.Cr_{2}O_{3}) = +3$
O.N. of Cr in $Z (Na_{2}Cr_{2}O_{7}) = +6$
Difference in O.N. of $Cr$ between $X$ and $Z = 6 - 3 = 3$