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Chemical reactions and equations

Maharashtra Board · Class 10 · Science

Quick revision notes for Chemical reactions and equations — Maharashtra Board Class 10 Science. Key concepts, formulas, and definitions for last-minute revision.

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Key Topics to Revise

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1. Chemical Reaction and Chemical Equation

  • A chemical reaction is a process in which some substances undergo bond breaking and are transformed into new substances by formation of new bonds.
  • Reactants are the substances taking part in a chemical reaction.
  • Products are the substances formed as a result of a chemical reaction.
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2. Balancing Chemical Equations

  • An equation is balanced when the number of atoms of each element is the same on both sides.
  • Balancing is done by trial and error using whole-number factors.
  • The formula of a compound must not be changed while balancing.
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3. Types of Chemical Reactions

  • Chemical reactions are mainly classified as combination, decomposition, displacement, and double displacement reactions.
  • When two or more reactants combine to form a single product, it is a combination reaction.
  • When one reactant gives two or more products, it is a decomposition reaction.
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4. Heat Changes in Reactions and Processes

  • Endothermic processes absorb heat from outside.
  • Exothermic processes give out heat.
  • Melting of ice and dissolution of potassium nitrate in water are endothermic processes.

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Full Notes

Key Concepts

A chemical reaction is a processA chemical reaction can be writtenAn equation is balanced ifWhen two or more reactants combineWhen a single reactant gives rise

Frequently Asked Questions

What are the important topics in Chemical reactions and equations for Maharashtra Board Class 10 Science?
Chemical reactions and equations covers several key topics that are frequently asked in Maharashtra Board Class 10 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Chemical reactions and equations — Maharashtra Board Class 10 Science?
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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