Hydrogen and Redox Reactions

In the following reaction reducing agent is 2K₃[Fe(CN)₆] + H₂O₂ + 2KOH → 2K₄[Fe(CN)₆] + 2H₂O + O₂

Options

(a) O₂ (b) H₂O (c) K₃[Fe(CN)₆] (d) H₂O₂

Correct Answer:

H₂O₂

Explanation:

No explanation […]

The oxidation state of Fe in brown ring complex [Fe(H₂O)₅NO]SO₄ is

Options

(a) 1 (b) 2 (c) 3 (d) 4

Correct Answer:

2

Explanation:

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Oxidation state of oxygen atom in potassium peroxide is

Options

(a) 0 (b) -1/2 (c) -1 (d) -2

Correct Answer:

-1

Explanation:

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Oxidation number of Fe in Fe₃O₄ is

Options

(a) 0 (b) ⁺2/5 (c) -1/2 (d) ⁺8/3

Correct Answer:

⁺8/3

Explanation:

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The oxyacid of phosphorus, in which phosphorus has the lowest oxidation state, is

Options

(a) metaphosphoric acid (b) pyrophosphoric acid (c) orthophosphoric acid (d) hypophosphorus acid

Correct Answer:

hypophosphorus acid

Explanation:

No explanation […]

The oxidation number of nitrogen in (N₂H₅)⁺ is

Options

(a) -2 (b) 2 (c) 3 (d) -3

Correct Answer:

-2

Explanation:

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If KMnO₄ is reduced by oxalic caid, in an acidic medium, then oxidation number of Mn changes from

Options

(a) 4 to 2 (b) 7 to 2 (c) 6 to 4 (d) 7 […]