MCQ quiz on Redox Reactions multiple choice questions and answers on Redox Reactions MCQ questions on Redox Reactions class 11 chemistry objectives questions with answer test pdf for interview preparations, freshers jobs and competitive exams. Professionals, Teachers, Students and Kids Trivia Quizzes to test your knowledge on the subject.

Redox Reactions Quiz Question with Answer

1. The colorless solution of silver nitrate slowly turns brown on adding copper chips to it because of

  1. Dissolution of Copper
  2. Oxidation of Ag+ -> Ag
  3. Reduction of Cu2+ ions
  4. Oxidation of Cu atoms

2. The oxidation process involves

  1. Increase in oxidation number
  2. Decrease in oxidation number
  3. No change in oxidation number
  4. none of the above

3. The oxidation number of Mn is maximum in

  1. MnO2
  2. K2MnO4
  3. Mn3O4
  4. KMnO4

4. KMnO4 reacts with oxalic acid according to the equation 2MnO4- + 5C2O42- + 16H+ -> 2Mn2+ +10CO2 + 8H2O , Here 20 mL of 0.1 M KMnO4 is equivalent to

  1. 50 mL of 0.5 M C2H2O4
  2. 20 mL of 0.1 M C2H2O4
  3. 20 mL of 0.5 M C2H2O4
  4. 50 mL of 0.1 M C2H2O4

5. Which of the following reactions does not involve either oxidation or reduction?

  1. VO2+ -> V2O3
  2. Na -> Na+
  3. CrO2-4 -> Cr2O72-
  4. Zn2+ -> Zn

6. The number of moles of KMnO4 reduced by one mole of KI in alkaline medium is

  1. One
  2. Two
  3. Five
  4. One fifth

7. Which of the following processes does not involve oxidation of iron?

  1. Formation of Fe (CO)5 from Fe.
  2. Liberation of H2 from steam by iron at high temperature.
  3. Rusting of iron sheets.
  4. Decolorization of blue CuSO4 solution by iron.

8. The oxidation state of Cr in Cr (CO)6 is

  1. 0
  2. 2
  3. 4
  4. 6

9. Which of the following processes does not involve either oxidation or reduction?

  1. Formation of slaked lime from quick lime
  2. Heating Mercuric Oxide
  3. Formation of Manganese Chloride from Manganese oxide
  4. Formation of Zinc from Zinc blende

10. The oxidation number of Cl in Cl2O7 is

  1. +7
  2. 5
  3. 3
  4. -7

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