NCERT Class 11 Chapter 8 Chemistry Redox Reactions MCQ

NCERT Class 11 Chapter 8 Chemistry Redox Reactions MCQ | Questions & Answers: This article will help you to take up the NCERT Class 11 Chapter 8 Chemistry Redox Reactions MCQ Quiz. As a result, you will get to know how much grip you have on the particular topic. Good luck!

Page 1 of 3

1. Which of the following process takes place in oxidation process?

A. Addition of oxygen

B. Addition of hydrogen

C. Addition of chlorine

D. Removal of oxygen

2. The loss of electron is termed as

A. oxidation

B. reduction

C. combustion

D. neutralization

3. When a strip of metallic zinc is placed in an aqueous solution of copper nitrate the blue colour of the solution disappear due to formation of

A. Zn²⁺

B. Cus

C. ZnS

D. Cu²⁺

4. The correct order of electron releasing tendency of the metals Cu, Zn and Ag is in the order

A. Zn > Cu > Ag

B. Zn > Ag > Cu

C. Cu > Zn > Ag

D. Ag > Zn > Cu

5. 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

6. Which of the following is the correct representative of stock notation for auric chloride?

A. Au(III)Cl₃

B. Au(II)Cl₂

C. Au(I)Cl₂

D. None of these

7. oxidation number of N in HNO₃ is

A. + 5

B. + 3.5

C. – 3.5

D. –5

8. The oxidation number of chromium in potassium dichromate is

A. + 6

B. – 5

C. – 2

D. + 2

9. Oxidation number of cobalt in K[Co(CO)₄] is

A. –3

B. +3

C. +1

D. –1

10. The oxidation state of osmium (Os) in OsO₄ is

A. +8

B. +6

C. +7

D. +4

Page 2 of 3

11. Which of the following transition metal has zero oxidation state ?

A. [Fe(CO)₅]

B. NOClO₄

C. NH₂.NH₂

D. CrO₅

12. In which of the compounds does 'manganese' exhibit highest oxidation number ?

A. KMnO₄

B. MnO₂

C. Mn₃O₄

D. MnSO₄

13. A metal ion M³⁺ loses 3 electrons, its oxidation number will be

A. +6

B. –3

C. +3

D. 0

14. The correct name for NO₂ using stock notation is

A. nitrogen (iv) oxide

B. All of these

C. nitrogen dioxide

D. nitrogen per oxide

15. The oxide, which cannot act as a reducing agent, is

A. CO₂

B. NO₂

C. SO₂

D. ClO₂

16. The oxidation state of Fe in Fe₃O₄ is

A. 8/3

B. + 2

C. + 3

D. + 6

17. In oxygen difluoride, the oxidation number of oxygen is

A. + 2

B. – 2

C. – 1

D. +1, – 2

18. Oxygen has an oxidation state of +2 in the compound

A. F₂O

B. None of these

C. CO₂

D. H₂O

19. The oxidation number of Cl in Cl₂O₇ is

A. + 7

B. + 5

C. + 3

D. – 7

20. What is known as Autooxidation?

A. Formation of H₂O by the oxidation of H₂O₂.

B. Formation of H₂O₂ by the oxidation of H2O.

C. Both (1) and (2) are true

D. None of the above

Page 3 of 3

21. The tendency of an electrode to lose electrons is known as

A. Electrode Potential

B. Reduction Potential

C. Oxidation Potential

D. E.M.F

22. If equal volumes of 1M KMnO4 and 1M K₂Cr₂O₇ solutions are allowed to oxidize Fe₂₊ in acidic medium. The amount of iron oxidized will be:

A. More with KMnO₂

B. More with K₂Cr₂O₇

C. Equal with both oxidising agents

D. Cannot be determined

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

A. Formation of slaked lime from quick lime

B. Heating Mercuric Oxide

C. Formation of Manganese Chloride from Manganese oxide

D. Formation of Zinc from Zinc blende

24. One mole of N₂H₄ loses ten moles of electrons to form a new compound A. Assuming that all the nitrogen appears in the new compound, what is the oxidation state of nitrogen in A? (There is no change in the oxidation state of hydrogen.)

A. -1

B. -3

C. +3

D. +5

25. How many millilitres of 0.5 M H₂SO₄ are needed to dissolve 0.5 g of copper(II)carbonate?

A. 6.01

B. 4.5

C. 8.1

D. 11.1