Class 11 Chemistry Redox Reactions Exam Questions

Read and download free pdf of Class 11 Chemistry Redox Reactions Exam Questions. Students and teachers of Class 11 Chemistry can get free advanced study material, revision notes, sure shot questions and answers for Class 11 Chemistry prepared as per the latest syllabus and examination guidelines in your school. Class 11 students should download this study material which will give them more knowledge for all chapters in Chemistry and all important topics which are scoring and can get you more marks. Students should also download free pdf of Chapter wise Notes for Class 11 Chemistry prepared by school teachers as per the latest NCERT, CBSE, KVS books and syllabus issued this year and also download free worksheets and question papers available here to get higher scores in school exams and tests, also click here for more Study Material for Class 11 Chemistry

Study Material for Class 11 Chemistry Chapter 8 Redox Reactions

Class 11 Chemistry students should refer to the following Pdf for Chapter 8 Redox Reactions in Class 11. These notes and test paper with questions and answers for Class 11 Chemistry will be very useful for exams and help you to score good marks

Class 11 Chemistry Chapter 8 Redox Reactions

Redox Reactions MCQ Questions with Answers Class 11 Chemistry


Question. Which element undergoes disproportionation in water?

(1) Cl2

(2) F2

(3) K

(4) Cs

 Answer (1)


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

(1) Liberation of H2 from steam by iron at high temperature

(2) Rusting of iron sheets

(3) Decolourization of blue CuSO4 solution by iron

(4) Formation of Fe(CO)5 from Fe

Answer (4)


Question. In which of the following compounds, nitrogen exhibits highest oxidation state? 

(1) N3H

(2) NH2OH

(3) N2H4

(4) NH3

Answer (1)


Question. Standard electrode potential for Sn4+ / Sn2+ couple is +0.15 V and that for the Cr3+ / Cr couple is–0.74 V. These two couples in their standard state are connected to make a cell. The cell potential will be

(1) +1.83 V

(2) +1.19 V

(3) +0.89 V

(4) +0.18 V

Answer (3)


Question. Standard reduction electrode potential of three metals X, Y and Z are –1.2 V, +0.5 V and –3.0 V respectively.The reducing power of these metals will be

(1) X > Y > Z

(2) Y > Z > X

(3) Y > X > Z

(4) Z > X > Y

Answer (4)


Question. A : Oxidation number of carbon in HCN is +4.
                 R : Oxidation state and valency is same for carbon.

Answer (4)


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

(1) CO2

(2) ClO2

(3) NO2

(4) SO2

Answer (1)


Question. A : Fluorine acts as a stronger oxidising agent than chlorine.
                 R : Standard reduction potential of fluorine is higher than Cl2.

Answer (1)


Question. Oxidation states of P in H4P2O5, H4P2O6, H4P2O7 are respectively 

(1) +3, +5, +4

(2) +5, +3, +4

(3) +5, +4, +3

(4) +3, +4, +5

Answer (4)

LEVEL – 1

1. Define oxidation and reduction in terms of oxidation number.

Ans: Increase in Oxidation Number is Oxidation and decrease in Oxidation Number is called reduction.

 

2. What is meant by disproportionation? Give one example.

Ans: In a disproportionation reaction an element simultaneously oxidized and reduced.

Class 11 Chemistry Redox Reactions Exam Questions

 

3. What is O.N. of sulphur in H2SO4?

Ans: +6

 

4. Identify the central atom in the following and predict their O.S. HNO3

Ans: central atom:- N; O.S. +5

 

5. Out of Zn and Cu which is more reactive?

Ans: Zn.

 

6. What is galvanization?

Ans: Coating of a less reactive metal with a more reactive metal e.g.- coatingof iron surface with Zn to prevent rusting of iron.

 

7. How is standard cell potential calculated using standard electrode potential?

Class 11 Chemistry Redox Reactions Exam Questions-2

9. The formation of sodium chloride from gaseous sodium and gaseous chlorideis a redox process justify.

Ans: Na atom get oxidize and Cl is reduced.


LEVEL – 2

1. Write the balanced redox reaction .

Class 11 Chemistry Redox Reactions Exam Questions-3


2. Identify the strongest & weakest reducing agent from the following metals:

Zn, Cu, Na, Ag, Sn

Ans: Strongest reducing agent: Na, weakest reducing agent: Ag.


3. Determine the oxidation no. of all the atoms in the following oxidants:KMnO4, K2Cr2O7 and KClO4

Ans :

In KMnO4 K = +1, Mn = +7, O = -2

In K2Cr2O7K = +1, Cr = +6, O = -2

In KClO4K = +1, Cl = =+7, O = -2

 

4. Determine the oxidation no. of all the atoms in the following species:Na2O2and OF2.

Ans:

In Na2O2Na = +1, O = -1

InOF2, F = -1, O = +2

 

5. Is it possible to store:

(i) H2SO4 in Al container?

(ii) CuSO4 solution in Zn vessel?

Ans : (i) yes. (ii) No.

 

Class 11 Chemistry Redox Reactions Exam Questions-4

 

Class 11 Chemistry Redox Reactions Exam Questions-5

8. Predict all the possible oxidation states of Cl in its compounds.

Ans: 0, -1, +1, +3, +5, +7

 

9. Formulate possible compounds of ‘Cl ‘in its O.S.is: 0, -1, +1, +3, +5, +7

Ans: Cl2, HCl, HOCl, HOClO, HOClO2, HOClO3 respectively.

 

10. List three measures used to prevent rusting of iron.

Ans:

(i) galvanization(coating iron by a more reactive metal)

(ii) greasing/oiling

(iii) painting.

 

LEVEL – 3

1. Write short notes on :

(a) Electrochemical series

(b) redox reactions

(c) oxidizing agents

Ans : (a) Electrochemical series :- arrangement of metals(non-metals also)in increasing order of their reducing power or vice versa. (b) Reactions in which both Oxidation and reduction take place simultaneously are REDOX reactions. (c) Oxidizing agents : chemical specie which can oxidize the other one or can reduce itself.

 

2. Calculate O. S. of sulphur in the following oxoacids of S : H2SO4, H2SO3 , H2S2Oand H2S2O7

Ans : +6, +4, +6 and +6 respectively.

 

3. Explain role of salt bridge in Daniel cell.

Ans :

(a) it completes the electric circuit in the cell.

(b) It maintains the electric neutrality in the cell.

 

4. Account for the followings :

(i) sulphur exhibits variable oxidation states.

(ii) Fluorine exhibits only -1 O.S.

(iii) Oxygen can’t extend its valency from 2.

Ans.

(i) Due to the presence of vacant d orbitals in sulphur.

(ii) It is most electronegative element

(iii) Small size/unavailability of vacant d orbitals in O 5. Complete and balance the following equations:

 

Class 11 Chemistry Redox Reactions Exam Questions-6

 

6. Identify the oxidizing and reducing agents in the following equations:

Class 11 Chemistry Redox Reactions Exam Questions-7


7 . Arrange the following in increasing order of their reducing power: Cu, Ag, Au, Zn, Fe, Al, Na, Mg, Pt(SHE), Hg, Ca, K

Ans : Au, Hg, Ag, Cu, Pt(SHE), Fe, Zn, Al, Mg, Na, Ca, K

LEVEL – 4

1.What is SHE? What is its use?Draw its diagram.

Ans : Standard Hydrogen Electrode (SHE) has been selected to have zero standard potential at all temperatures. It consists of a platinum foilcoated with platinum black (finely divided platinum) dipping partially into an aqueous solution in which the activity (approximate concentration 1M) of hydrogen ion is unity and hydrogen gas is bubbled through the solution at 1 bar pressure. The potential of the other half cell is measured by constructing a cell in which reference electrode is standard hydrogen electrode. The potential of the other half cell is equal to the potential of the cell.

 

2. We spend crore of Rupees and even thousands of lives every year due tocorrosion. How can it be prevented? Explain.

Ans : (i) By Galvanization: Coating of a less reactive metal with a more reactive metal e.g.- coating of iron surface with Zn to prevent rusting of iron.

(ii) By greasing /oiling (to keep away the object from the contact of air&moisture.)

(iii)By painting (to keep away the object from the contact of air &moisture.)

 

Class 11 Chemistry Redox Reactions Exam Questions-8

 

Chapter 04 Chemical Bonding and Molecular Structure
Class 11 Chemistry Chemical Bonding and Molecular Structure Exam Questions

More Study Material

CBSE Class 11 Chemistry Chapter 8 Redox Reactions Study Material

We hope students liked the above Study Material for Chapter 8 Redox Reactions designed as per the latest syllabus for Class 11 Chemistry released by CBSE. Students of Class 11 should download the Study Material in Pdf format, read the notes and related questions and solutions given in above Class 11 Chemistry Study Material on daily basis. All latest Study Material have been developed for Chemistry by referring to the most important and regularly asked topics which the students should learn and practice to get better score in school tests and examinations. Studiestoday is the best portal for Class 11 students to get all latest study material free of cost.

Study Material for Chemistry CBSE Class 11 Chapter 8 Redox Reactions

Expert teachers of studiestoday have referred to NCERT book for Class 11 Chemistry to develop the Chemistry Class 11 Study Material. If you download Study Material for the above chapter daily, you will get higher and better marks in Class 11 test and exams in the current year as you will be able to have stronger understanding of all concepts. Daily reading of Chemistry study material will help students to have stronger understanding of all concepts and also make them expert on all critical topics. You can easily download and save all Study Material for Class 11 Chemistry also from www.studiestoday.com without paying anything in Pdf format. After solving the questions given in the Study Material which have been developed as per latest course books also refer to the NCERT solutions for Class 11 Chemistry designed by our teachers

Chapter 8 Redox Reactions Study Material Chemistry CBSE Class 11

All Study Material given above for Class 11 Chemistry have been made as per the latest syllabus and books issued for the current academic year. The students of Class 11 can refer to the answers which have been also provided by our teachers for all Study Material of Chemistry so that you are able to solve the questions and then compare your answers with the solutions provided by us. We have also provided lot of MCQ questions for Class 11 Chemistry so that you can solve questions relating to all topics given in each chapter. Also download Class 11 Chemistry Sample Papers given on studiestoday.

Chapter 8 Redox Reactions CBSE Class 11 Study Material Chemistry

Regular Study Material reading helps to gain more comprehensive understanding of Chapter 8 Redox Reactions concepts. Study Material play an important role in developing understanding of Chapter 8 Redox Reactions in CBSE Class 11. Students can download and save or print all the Study Material, printable assignments, practice sheets of the above chapter in Class 11 Chemistry in Pdf format from studiestoday. You can print or read them online on your computer or mobile or any other device. After solving these you should also refer to Class 11 Chemistry MCQ Test for the same chapter

CBSE Study Material Chemistry Class 11 Chapter 8 Redox Reactions

CBSE Class 11 Chemistry best textbooks have been used for writing the problems given in the above Study Material. If you have tests coming up then you should revise all concepts relating to Chapter 8 Redox Reactions and then take out print of the above Study Material and attempt all problems. We have also provided a lot of other Study Material for Class 11 Chemistry which you can use to further make yourself better in Chemistry.

How to download CBSE Class 11 Chemistry Chapter 8 Redox Reactions study material

You can download free study material for Class 11 Chemistry Chapter 8 Redox Reactions for latest academic session from StudiesToday.com

Can I download study material for Chapter 8 Redox Reactions Class 11 Chemistry in Pdf format

Yes, you can click on the link above and download PDFs for Class 11 Chemistry Chapter 8 Redox Reactions easily for regular use

Is the study material for Chapter 8 Redox Reactions Class 11 Chemistry for the latest CBSE academic session

Yes, the study material given here for Class 11 Chemistry Chapter 8 Redox Reactions is for current CBSE session

Can I download Chapter 8 Redox Reactions Class 11 Chemistry study notes in pdf

You, just click the link above and save Class 11 study material for Chemistry Chapter 8 Redox Reactions in Pdf

Is there any charge for Class 11 Chemistry Chapter 8 Redox Reactions concepts and study material

All study maetrial for CBSE Class 11 Chemistry Chapter 8 Redox Reactions is free

Tell me the best website to get study material for Chapter 8 Redox Reactions Class 11 Chemistry

www.studiestoday.com is the best portal for Chapter 8 Redox Reactions Chemistry Class 11 study material

How to get topic-wise study material for Class 11 Chemistry Chapter 8 Redox Reactions

Visit www.studiestoday.com for best study material for Class 11 Chemistry Chapter 8 Redox Reactions

How to print Chapter 8 Redox Reactions Class 11 Chemistry study notes as per CBSE syllabus

All study material for various topics of Class 11 Chemistry Chapter 8 Redox Reactions as per latest CBSE syllabus is avaiable here