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9 - Oxidation and Reduction Reactions

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✅EvaluateQuestion 1 of 21

What happens to an element when it is oxidised?

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✅EvaluateQuestion 2 of 21

Which of the following is always true for a reduction process?

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✅EvaluateQuestion 3 of 21

The oxidation number of an element in its natural state (e.g., O₂, N₂, H₂) is:

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✅EvaluateQuestion 4 of 21

Which of the following is a reducing agent?

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✅EvaluateQuestion 5 of 21

The oxidation number of oxygen in hydrogen peroxide (H₂O₂) is:

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✅EvaluateQuestion 6 of 21

What does OIL RIG stand for?

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✅EvaluateQuestion 7 of 21

Which process is an example of oxidation?

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✅EvaluateQuestion 8 of 21

In NaCl, the oxidation number of chlorine is:

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✅EvaluateQuestion 9 of 21

Which of the following reactions represents reduction?

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✅EvaluateQuestion 10 of 21

Which species is oxidised in the reaction: Cl₂ + 2Br⁻ → 2Cl⁻ + Br₂?

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✅EvaluateQuestion 11 of 21

The oxidising agent in the reaction CuO + H₂ → Cu + H₂O is:

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✅EvaluateQuestion 12 of 21

Which of the following best describes oxidation in terms of oxidation number?

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✅EvaluateQuestion 13 of 21

When magnesium reacts with oxygen, what type of reaction occurs?

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✅EvaluateQuestion 14 of 21

The reducing agent in a redox reaction is the substance that:

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✅EvaluateQuestion 15 of 21

What is the oxidation number of nitrogen in HNO₃?

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✅EvaluateQuestion 16 of 21

In the reaction Fe²⁺ → Fe³⁺ + e⁻, which statement is correct?

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✅EvaluateQuestion 17 of 21

Identify the oxidising agent in the reaction Zn + CuSO₄ → ZnSO₄ + Cu.

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✅EvaluateQuestion 18 of 21

Which of the following reactions involves both oxidation and reduction?

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✅EvaluateQuestion 19 of 21

When chlorine acts as a bleaching agent, it:

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✅EvaluateQuestion 20 of 21

What is the oxidation number of chromium in Cr₂O₃?

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✅EvaluateQuestion 21 of 21

During corrosion of iron, which condition speeds up oxidation the most?

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✅EvaluateQuestion 1 of 21

What happens to an element when it is oxidised?

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