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Electro Chemistry

Telangana Open School (TOSS) · Class 12 · Chemistry

Quick revision notes for Electro Chemistry — Telangana Open School (TOSS) Class 12 Chemistry. Key concepts, formulas, and definitions for last-minute revision.

45 questions30 flashcards5 concepts

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Key Topics to Revise

1

1. Oxidation and Reduction (Redox Reactions)

  • Oxidation is the loss of electrons; reduction is the gain of electrons.
  • Oxidation and reduction always occur together in a redox reaction.
  • The species that loses electrons is oxidized and acts as a reducing agent (reductant).
2

2. Oxidation Number and Rules

  • Oxidation number is the apparent charge on an atom in a compound or ion.
  • It helps identify oxidation and reduction in polyatomic species.
  • Rules help assign oxidation numbers systematically.
3

3. Balancing Redox Reactions

  • Two methods: Oxidation Number Method and Ion-Electron (Half-Reaction) Method.
  • Both ensure conservation of mass and charge.
  • Ion-electron method is preferred in acidic or basic media.
4

4. Electrolytic Conduction and Conductivity

  • Electrolytes conduct electricity in aqueous or molten state due to ion movement.
  • Conductance (L) = 1/R; measured in siemens (S).
  • Conductivity (κ) = 1/ρ; unit S cm⁻¹.

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Full Notes

Key Concepts

Oxidation is the loss of electronsThe oxidation number is the apparentTwo methods are usedElectrolytic cells use electrical energyElectrode potential measures the tendency

Frequently Asked Questions

What are the important topics in Electro Chemistry for Telangana Open School (TOSS) Class 12 Chemistry?
Electro Chemistry covers several key topics that are frequently asked in Telangana Open School (TOSS) Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Electro Chemistry — Telangana Open School (TOSS) Class 12 Chemistry?
Understand the core concepts first, then work through the 45 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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