Free Oxidation and Reduction MCQs with Answers
64 Oxidation and Reduction MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Oxidation involves loss of electrons, increase in oxidation number or addition of oxygen, while reduction involves electron gain, decrease in oxidation number or removal of oxygen. The topic covers oxidising and reducing agents, oxidation-number changes, redox equations and the distinction between oxidation at the anode and reduction at the cathode.
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64 questions · page 4 of 4
- A. +1
- B. +5
- C. -1
- D. +3
Explanation: In the compound NCLO3, the oxidation state of Cl (chlorine) is indeed +5.
Correct answer: +1- A. Oxygen
- B. Fluorine
- C. chlorine
- D. Both (A) & (C)
Explanation: Fluorine has a consistent oxidation number of -1 in all of its compounds because it is the most electronegative element and always gains…
Correct answer: Fluorine- A. Mn+4
- B. Mn-1
- C. Mn+6
- D. All of the above
Explanation: So, an oxidizing agent is a substance that causes other substances to lose electrons, resulting in oxidation.
Correct answer: Mn+4- A. Cl2
- B. F2
- C. Br2
- D. I2
Explanation: A reducing agent is a substance that causes another substance to be reduced in a chemical reaction.
Correct answer: I2