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Oxidation and Reduction


1. 

In the complex K4 [Fe (CN)6 ] the oxidation number of iron is

Answer : D. 2

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2. 

The oxidation number of C in oxalic acid (H2 C2 O4) is

Answer : C. 3

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3. 

Reduction is addition of

Answer : A. Hydrogen

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4. 

Oxidation number of sulphur in sulphuric acid is

Answer : C. six

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5. 

The oxidation number of chromium in K2 Cr2 O7 is

Answer : A. 6

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6. 

Oxidation is the addition of

Answer : B. Oxygen

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