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Determine oxidation number of the elements underlined in each of the following.

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Determine oxidation number of the elements underlined in each of the following.

(a) KMnO4

(b) NH4NO3

(c) K3Fe(CN)6

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(a) KMnO4 : 1 + x + (4 x -2) = 0

1 + x - 8 = 0

x = +7

(b) NH4NO3 : x + (+1 x 4) + 5 + (-2 x 3) = 0

x + 4 + 5 - 6 = 0

x = 6 - 5 - 4 = -3

(c) K3Fe(CN)6 :(+3) + x - 6 = 0

x = 6 - 3 = +3

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