Redox Reactions Class 11 MCQ is one of the best strategies to prepare for the CBSE Class 11 Board exam. If you want to complete a grasp concept or work on one’s score, there is no method except constant practice. Students can improve their speed and accuracy by doing more MCQs on Redox Reactions Class 11, which will help them all through their board tests.
Class 11 Chemistry Redox Reaction MCQ Question with Answer
Class 11 Chemistry MCQ with answers are given here to Chapter 8 Redox Reactions. These MCQs are based on the latest CBSE board syllabus and relate to the latest Class 11 Chemistry syllabus. By Solving these Class 11 MCQs, you will be able to analyze all of the concepts quickly in the chapter and get ready for the Class 11 Annual exam.
Learn Class 11 Redox Reactions MCQs with answers pdf free download according to the latest CBSE and NCERT syllabus. Students should prepare for the examination by solving CBSE Class 11 Chemistry Redox Reactions MCQ with answers given below
Question 1. The correct order of N-compounds in its decreasing order of oxidation states is
(a) HNO3, NO, N2, NH4Cl
(b) HNO3, NO, NH4Cl, N2
(c) HNO3, NH4Cl, NO, N2
(d) NH4Cl, N2, NO, HNO3
Question 2. Which of the following is redox reaction?
(a) Evaporation of H2O
(b) Both oxidation and reduction
(c) H2SO4 with NaOH
(d) In atmosphere O3 from O2 by lightning
Question 3. What is the change in oxidation number of carbon in the following reaction? CH4(g) + 4Cl2(g) → CCl4(l) + 4HCl(g)
(a) + 4 to + 4
(b) 0 to + 4
(c) – 4 to + 4
(d) 0 to – 4
Question 4. The oxidation state of Cr in CrO5 is
Question 5. A mixture of potassium chlorate, oxalic acid and sulphuric acid is heated. During the reaction which element undergoes maximum change in the oxidation number?
Question 6. Oxidation numbers of P in PO4 3–, of S in SO4 2– and that of Cr in Cr2O7 2– are respectively
(a) +3, +6 and +5
(b) +5, +3 and +6
(c) –3, +6 and +6
(d) +5, +6 and +6
Question 7. Without losing its concentration, ZnCl2 solution cannot be kept in contact with
Question 8. The pair of compounds that can exist together is
(a) FeCl3, SnCl2
(b) HgCl2, SnCl2
(c) FeCl2, SnCl2
(d) FeCl3, KI
Question 9. Hot concentrated sulphuric acid is a moderately strong oxidizing agent. Which of the followingreactions does not show oxidizing behaviour?
(a) Cu + 2H2SO4 → CuSO4 + SO2 + 2H2O
(b) S + 2H2SO4 → 3SO2 + 2H2O
(c) C + 2H2SO4 → CO2 + 2SO2 + 2H2O
(d) CaF2 + H2SO4 → CaSO4 + 2HF
Question 10. Oxidation state of Fe in Fe3O4 is
(a) 5 4
(b) 4 5
(c) 3 2
(d) 8 3
Question 11. Number of moles of MnO4 – required to oxidize one mole of ferrous oxalate completely in acidic medium will be
(a) 7.5 moles
(b) 0.2 moles
(c) 0.6 moles
(d) 0.4 moles.
Question 12. Which is the best description of the behaviour of bromine in the reaction given below? H2O + Br2 → HOBr + HBr
(a) Proton acceptor only
(b) Both oxidised and reduced
(c) Oxidised only
(d) Reduced only
Question 13. (I) H2O2 + O3→ H2O + 2O2 (II) H2O2 + Ag2O →2Ag + H2O + O2 Role of hydrogen peroxide in the above reactions is respectively
(a) oxidizing in (I) and reducing in (II)
(b) reducing in (I) and oxidizing in (II)
(c) reducing in (I) and (II)
(d) oxidizing in (I) and (II)
Question 14. The oxidation states of sulphur in the anions SO3 2–, S2O4 2– and S2O6 2– follow the order
(a) S2O4 2– < SO3 2– < S2O6 2–
(b) SO3 2– < S2O4 2– < S2O6 2–
(c) S2O4 2– < S2O6 2– < SO3 2–
(d) S2O6 2– < S2O4 2– < SO3 2–
Question 15. Reaction of sodium thiosulphate with iodine gives
(a) tetrathionate ion
(b) sulphide ion
(c) sulphate ion
(d) sulphite ion.
Question 16. The oxide, which cannot act as a reducing agent is
Question 17. In the reaction given below, identify the species undergoing redox reaction 2Na(s) + H2(g) → 2NaH(s)
(a) Na is reduced and hydrogen is oxidised
(b) Na is oxidised and hydrogen is reduced
(c) Na undergoes oxidation and hydrogen undergoesreduction
(d) Both (b) and (c)
Question 18. The loss of electron is termed as
Question 19. The oxidation state of I in H4IO6 – is
(a) + 1
(b) – 1
(c) + 7
(d) + 5
Question 20. Which of the following process takes place in oxidation process?
(a) Addition of oxygen
(b) Addition of hydrogen
(c) Removal of oxygen
(d) Addition of chlorine
Question 21. When a strip of metallic zinc is placed in an aqueous solution of copper nitrate the blue colour of the solutiondisappear due to formation of
Question 22. The correct order of electron releasing tendency of the metals Cu, Zn and Ag is in the order:
(a) Cu > Zn > Ag
(b) Zn > Ag > Cu
(c) Ag > Zn > Cu
(d) Zn > Cu > Ag
Question 23. In the following reaction 4P + 3KOH+ 3H2O→3KH2PO2 + PH3
(a) phosphorus is both oxidised and reduced.
(b) only phosphorus is reduced.
(c) phosphorus is not oxidised
(d) None of these
Question 24. Which one of the following reaction involves oxidationreduction ?
(a) H2 +Br2 →2HBr
(b) NaBr + HCl → NaCl + HBr
(c) HBr + AgNO 3 → AgBr + HNO 3
(d) 2NaOH + H2SO4 → Na 2SO4 + 2H2O
Question 25. ‘Oxidation number of H in NaH, CaH2 and LiH, respectively is
(a) +1, +1, –1
(b) –1, +1, + 1
(c) +1, + 1, + 1
(d) –1,–1, –1
Whoever needs to take the CBSE Class 11 Board Exam should look at this MCQ. To the Students who will show up in CBSE Class 11 Chemistry Board Exams, It is suggested to practice more and more questions. Aside from the sample paper you more likely had solved. These Redox Reactions Class 11 MCQ are ready by the subject specialists themselves.
Question 26. Which of the following is the correct representative of stock notation for auric chloride?
(d) None of these
Question 27. In reaction, 4Na + O2 → 2Na2O, sodium behaves as
(a) oxidising agent
(b) reducing agent
(c) Both (a) and (b)
(d) None of these
Question 28. What is the oxidation number of elements in the free or in the uncombined state ?
Question 29. In which of the following compounds oxygen has highest oxidation state and in which it has lowest oxidation state? OF2, H2O2, KO2, O2F2
(a) Highest = KO2, lowest = H2O2
(b) Highest = OF2, lowest = K2O2
(c) Highest = OF2, lowest = KO2
(d) Highest = KO2, lowest = H2O2
Question 30. Oxidation number of N in HNO3 is
(a) – 3.5
(b) + 3.5
(d) + 5
Question 31. In which of the following reactions, there is no change in valency ?
(a) 4 KClO3→ 3KClO4 + KCl
(b) SO2 + 2H2S → 2H2O + 3S
(c) BaO2 + H2SO4→ BaSO4 + H2O2
(d) 3 BaO + O2 → 2 BaO2.
Question 32. Co(s) + Cu2+ (aq)→Co2+ (aq) + Cu(s) The above reaction is
(a) oxidation reaction
(b) reduction reaction
(c) redox reaction
(d) None of these
Question 33. One mole of N2H4 loses 10 moles of electrons to form a new compound, y. Assuming that all nitrogen appear in the newcompound, what is the oxidation state of nitrogen in y There is no change in the oxidation state of hydrogen )
Question 34. Oxidation number of carbon in CH2Cl2 is
Question 35. In which of the following compounds, iron has lowest oxidation state?
(a) K3[Fe(CN)6 ]
(b) K4[Fe(CN)6 ]
(c) FeSO4.(NH4 )2SO4.6H2O
Question 36. The oxidation number of chromium in potassium dichromate is
(a) + 6
(b) – 5
(c) – 2
(d) + 2
Question 37. Oxidation number of nitrogen in (NH4)2SO4 is
Question 38. The oxidation number of sulphur in S8, S2F2, H2S respectively, are
(a) 0, +1 and –2
(b) +2, +1 and –2
(c) 0, +1 and +2
(d) –2, +1 and –2
Question 39. The oxidation state of osmium (Os) in OsO4 is
Question 40. Which of the following transition metal has zero oxidation state ?
Question 41. Among the following, identify the species with an atom in +6 oxidation state
(c) NiF6– 2
Question 42. Oxidation number of cobalt in K[Co(CO)4] is
Question 43. In which of the compounds does ‘manganese’ exhibit highest oxidation number ?
Questionb 44. The oxide, which cannot act as a reducing agent, is
Question 45. The oxidation state of Fe in Fe3O4 is
(a) + 3
(c) + 6
(d) + 2
Question 46. A metal ion M3+ loses 3 electrons, its oxidation number will be
Question 47. The correct name for NO2 using stock notation is
(a) nitrogen dioxide
(b) nitrogen (iv) oxide
(c) nitrogen per oxide
(d) All of these
Question 48. In which of the following compounds, the oxidation number of iodine is fractional ?
Question 49. In oxygen difluoride, the oxidation number of oxygen is
(a) – 2
(b) – 1
(c) + 2
(d) +1, – 2
Question 50. In which of the following compounds the oxidation number of carbon is not zero?
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Frequently Asked Question (FAQs)
How many MCQ questions are there in Class 11 chapter 8 Chemistry?
In Class 11 chapter 8 Chemistry, we have provided 50 Important MCQ Questions, But in the future, we will add more MCQs so that you can get good marks in the Class 11 exam.
Can we score good marks in Class 11 Chemistry with the help of Redox Reactions MCQ Questions?
Yes, MCQ Question is one of the best strategies to make your preparation better for the CBSE Board Exam. It also helps to know the student’s basic understanding of each chapter. So, You can score good marks in the Class 11 Chemistry exam.