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Q.

The oxidation states of transition metal atoms in $K_{2} C r_{2} O_{7}, K M n O_{4} a n d K_{2} F e O_{4}$ respectively are $x, y a n d z .$ The sum of $x, y a n d z$ is ____

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a

22

b

20

c

18

d

19

answer is B.

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Detailed Solution

$x = + 6, y = + 7 a n d z = + 6$

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