Download the latest CBSE Class 11 Chemistry Redox Reactions Notes Set C in PDF format. These Class 11 Chemistry revision notes are carefully designed by expert teachers to align with the 2025-26 syllabus. These notes are great daily learning and last minute exam preparation and they simplify complex topics and highlight important definitions for Class 11 students.
Chapter-wise Revision Notes for Class 11 Chemistry Chapter 7 Redox Reactions
To secure a higher rank, students should use these Class 11 Chemistry Chapter 7 Redox Reactions notes for quick learning of important concepts. These exam-oriented summaries focus on difficult topics and high-weightage sections helpful in school tests and final examinations.
Chapter 7 Redox Reactions Revision Notes for Class 11 Chemistry
Oxidation number denotes theoxidation state of an element in a compound ascertained according to a setof rules formulated on the basis thatelectron in a covalent bond belongsentirely to more electronegative element.
Calculation of oxidation number-
1. O. S. of all the elements in their elemental form (in standard state) is taken as zero O. S. of elements in Cl2, F2, O2, P4, O3, Fe(s), H2, N2, C(graphite) is zero.
2. Common O. S. of elements of group one (1st) is one. Common O. S. of elements of group two (2nd) is two.
3. For ions composed of only one atom, theoxidation number is equal to the chargeon the ion.
4. The oxidation number of oxygen in most compounds is –2.While in peroxides (e.g., H2O2, Na2O2), eachoxygen atom is assigned an oxidationnumber of –1, in superoxides (e.g., KO2,RbO2) each oxygen atom is assigned anoxidation number of –(½).
5. In oxygendifluoride (OF2) and dioxygendifluoride (O2F2), the oxygen is assignedan oxidation number of +2 and +1,respectively.
6. The oxidation number of hydrogen is +1 but in metal hydride its oxidation no. is–1.
7. In all its compounds, fluorine has anoxidation number of –1.
8. The algebraic sum of the oxidation numberof all the atoms in a compound must bezero.
9. In polyatomic ion, the algebraic sumof all the oxidation numbers of atoms ofthe ion must equal the charge on the ion.
Stocknotation: the oxidationnumber is expressed by putting a Romannumeral representing the oxidation numberin parenthesis after the symbol of the metal inthe molecular formula. Thus aurous chlorideand auric chloride are written as Au(I)Cl andAu(III)Cl3. Similarly, stannous chloride andstannic chloride are written as Sn(II)Cl2andSn(IV)Cl4.
Oxidation: An increase in the oxidationnumber
Reduction: A decrease in the oxidationnumber
Oxidising agent: A reagent which canincrease the oxidation number of an elementin a given substance. These reagents are calledas oxidants also.
Reducing agent: A reagent which lowers the oxidation number of an element in a givensubstance. These reagents are also called asreductants.
Redox reactions: Reactions which involvechange in oxidation number of the interactingspecies.
Balancing of redox reactions: Oxidation Number Method: Write the net ionic equation for the reaction of potassium dichromate(VI), K2Cr2O7 with sodium sulphite,Na2SO3, in an acid solution to give chromium(III) ion and the sulphate ion.
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Important Practice Resources for Class 11 Chemistry
CBSE Class 11 Chemistry Chapter 7 Redox Reactions Notes
Students can use these Revision Notes for Chapter 7 Redox Reactions to quickly understand all the main concepts. This study material has been prepared as per the latest CBSE syllabus for Class 11. Our teachers always suggest that Class 11 students read these notes regularly as they are focused on the most important topics that usually appear in school tests and final exams.
NCERT Based Chapter 7 Redox Reactions Summary
Our expert team has used the official NCERT book for Class 11 Chemistry to design these notes. These are the notes that definitely you for your current academic year. After reading the chapter summary, you should also refer to our NCERT solutions for Class 11. Always compare your understanding with our teacher prepared answers as they will help you build a very strong base in Chemistry.
Chapter 7 Redox Reactions Complete Revision and Practice
To prepare very well for y our exams, students should also solve the MCQ questions and practice worksheets provided on this page. These extra solved questions will help you to check if you have understood all the concepts of Chapter 7 Redox Reactions. All study material on studiestoday.com is free and updated according to the latest Chemistry exam patterns. Using these revision notes daily will help you feel more confident and get better marks in your exams.
You can download the teacher prepared revision notes for CBSE Class 11 Chemistry Redox Reactions Notes Set C from StudiesToday.com. These notes are designed as per 2025-26 academic session to help Class 11 students get the best study material for Chemistry.
Yes, our CBSE Class 11 Chemistry Redox Reactions Notes Set C include 50% competency-based questions with focus on core logic, keyword definitions, and the practical application of Chemistry principles which is important for getting more marks in 2026 CBSE exams.
Yes, our CBSE Class 11 Chemistry Redox Reactions Notes Set C provide a detailed, topic wise breakdown of the chapter. Fundamental definitions, complex numerical formulas and all topics of CBSE syllabus in Class 11 is covered.
These notes for Chemistry are organized into bullet points and easy-to-read charts. By using CBSE Class 11 Chemistry Redox Reactions Notes Set C, Class 11 students fast revise formulas, key definitions before the exams.
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