Q1. Oxidation is a chemical reaction in which _______
- Aelectron is lost
- BOxygen combines with
- CThe proportion of electropositive groups increases
- DAll of the above
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Answer: D) All of the above
Oxidation and Reduction
36 MCQ questions with answers and explanations · page 1 of 2
Test yourself▶ 25 question test
Q2. Reduction is a chemical reaction in which-
- Aelectron is lost
- BOxygen combines with
- CThe proportion of electronegative groups increases
- Delectrons are captured
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Answer: D) electrons are captured
Q3. The tendency to lose electrons is called ____
- AOxidation
- Breduction
- Ccatalysis
- Dmotivation
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Answer: A) Oxidation
Q4. The tendency to gain electrons is called_
- AOxidation
- Breduction
- Ccatalysis
- Dmotivation
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Answer: B) reduction
Q5. What is the process of combining with electropositive elements called?
- AOxidation
- Breduction
- Ccombustion
- Dtoothpaste
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Answer: B) reduction
Q6. The process of combining with electronegative elements or groups is called_
- AOxidation
- Breduction
- Cmotivation
- Dmotivation
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Answer: A) Oxidation
Q7. In the oxidation reaction, the ratio of electronegative element or group is ____
- Athere is a shortage
- BThere is an increase
- Cnever increasing
- Dnone of these
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Answer: B) There is an increase
Q8. Oxidation is the process in which the valency of an element _______
- AIt decreases.
- Bincreases
- Cremains unchanged
- Dnone of these
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Answer: B) increases
Q9. In oxidation reduction reaction_
- AThe core electrons of the atom participate
- BThe valence electrons of an atom participate in
- CThe electrons of the first orbit of the atom participate in
- DThe nucleus of the atom participates in
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Answer: B) The valence electrons of an atom participate in
Q10. In any reaction, oxidation/reduction
- AThere are different
- Bare together
- COxidation occurs first, then reduction
- DFirst there is reduction, then oxidation
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Answer: B) are together
Q11. Which of the following is both an oxidising agent and a reducing agent?
- AH²O²
- BKClO³
- CKMnO⁴
- DHON³
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Answer: A) H²O²
Q12. Which of the following substances is used as both an oxidising agent and a reducing agent?
- Asodium thiosulfate
- Bsodium nitrate
- Csodium nitrite
- Dsodium sulfide
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Answer: C) sodium nitrite
Q13. The process associated with the burning of hydrogen is_
- Ahydration
- Breduction
- COxidation
- Dhydrogenation
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Answer: C) Oxidation
Q14. Rusting of iron is an example of what?
- AOxidation
- Breduction
- Cpolymerization
- DGalvanization
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Answer: A) Oxidation
Q15. The process of conversion of Fe into Fe is ____
- AOxidation
- Breduction
- CIonization
- Dnuclear reaction
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Answer: A) Oxidation
Q16. In which oxidation state of chlorine is +1?
- Ahypochlorous acid
- Bhydrochloric acid
- CZinc Chloride
- Dchlorine
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Answer: A) hypochlorous acid
Q17. Oxygen has a positive (+ve) oxygen number
- Ain op²
- BIn CI²O
- CH²O
- DN²O
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Answer: A) in op²
Q18. The oxidation state of Mn in K²MnO⁴ is_
- A2
- B9
- C-2
- D6
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Answer: D) 6
Q19. The oxidation state of Cr in KC² Cr² O² is_
- A6
- B-6
- C7
- D-7
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Answer: A) 6
Q20. The oxidation state of S in Na²SO⁴ is_
- A6
- B7
- C8
- D9
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Answer: A) 6
Q21. The oxidation state of Mn in KMnO⁴ is_
- A.+2
- B.-2
- C.+7
- D.-7
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Answer: C) .+7
Q22. Which of the following is the correct oxidation number of KOH (Fe) in hexacyanoferrate ion (Pe(CN⁶)⁴ I)?
- A.+2
- B.+3
- C.+4
- D.-2
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Answer: A) .+2
Q23. Which one of the following chemical elements has the same oxidation state in all its compounds?
- ACarbon
- BFluorine
- Chydrogen
- Doxygen
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Answer: B) Fluorine
Q24. In the reaction of potassium permanganate with ferrous ammonium sulphate in ambient medium KMnO⁴, the change in oxidation state of Mn is_
- A.+5 to +2
- B.+6 to +2
- C.+7 to +2
- D.+7 to +3
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Answer: C) .+7 to +2
Q25. The oxidation number of nickel in K⁴(NI(CN)⁴,] is_
- AZero
- B.+4
- C.-4
- D.+8
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Answer: A) Zero