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Assigning Oxidation Numbers

When K2Cr2O7 ...

Question

When $K_{2} C r_{2} O_{7}$ is converted to $K_{2} C r O_{4}$ the change in the oxidation state of chromium is

A

0

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B

6

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C

4

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D

3

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Solution

The correct option is A
0

$K_{2} + 6 C r_{2} O_{7} \to K_{2} + 6 C r_{2} O_{4}$ . In this reaction, there is no change in oxidation state of chromium.

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When $K_{2} C r_{2} O_{7}$ is converted to $K_{2} C r O_{4}$ the change in the oxidation state of chromium is

K_{2} C r_{2} O_{7}

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K_{2} C r O_{4},

the change in oxidation no. of Cr is:

Q. When potassium dichromate,

K_{2} {C r}_{2} O_{7}

is converted into

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, the oxidation state of chromium changes. Select the right option.

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