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Questions and Answers
What is the purpose of a word equation in chemistry?
How are the reactants represented in a word equation?
What determines the rate of a chemical reaction?
Which observation helps determine a chemical reaction?
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In a chemical reaction, what happens to reactants?
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Why do reaction speeds often increase as temperature rises?
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What is a chemical reaction?
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What is the difference between a chemical change and a physical change?
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Which of the following is an example of a physical change?
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In a chemical reaction, what happens to the constituent atoms of reactants?
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What occurs during a physical change?
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Which reaction results in the formation of two new substances?
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Study Notes
Importance of CBSE Class 10 Science Notes
- CBSE Notes for Class 10 Science are essential study materials for students to score good marks in the board exam.
- Chapter-wise CBSE Class 10 Notes provide detailed explanations, illustrative examples, solved questions, and sample questions from NCERT books.
Chemical Reactions and Equations
- A chemical reaction occurs when one or more reactants are changed into one or more products, resulting in the formation of various substances with new physical and chemical properties.
- Chemical change involves the formation of one or more new substances with new physical and chemical properties.
- Physical change involves a change in colour or state, but no new substance is formed.
Types of Chemical Reactions
- Combination reactions
- Decomposition reactions
- Single displacement reactions
- Double displacement reactions
- Redox reactions
- Endothermic reactions
- Exothermic reactions
- Precipitation reactions
- Neutralisation reactions
Observations that Help Determine a Chemical Reaction
- Evolution of a gas
- Change in temperature
- Formation of a precipitate
- Change in colour
- Change of state
Chemical Equations
- A chemical equation is a shorthand way of expressing a chemical reaction.
- A word equation is a chemical reaction expressed in words rather than chemical formulas.
- A word equation helps identify the reactants and products in a chemical reaction.
- Reactants are shown on the left side of a word equation, separated by a plus sign (+) if there is more than one reactant.
- Products are shown on the right side of a word equation, separated by a plus sign (+) if there is more than one product.
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Description
Study chapter-wise CBSE Science Notes for Class 10 in PDF format to help students prepare effectively for the board exams. These notes are designed to assist students in developing a proper study methodology to succeed in their exams.
