Podcast
Questions and Answers
What is the purpose of a word equation in chemistry?
What is the purpose of a word equation in chemistry?
- To identify the reactants and products in a chemical reaction using words (correct)
- To determine the evolution of gas in a chemical reaction
- To showcase the color changes in a chemical reaction
- To represent chemical reactions using only chemical formulas
How are the reactants represented in a word equation?
How are the reactants represented in a word equation?
- Separated by a plus sign on the left side of the equation (correct)
- In a separate document
- On the right side of the equation
- Using chemical formulas
What determines the rate of a chemical reaction?
What determines the rate of a chemical reaction?
- Types of products formed
- Temperature and pressure
- Number of reactants
- Activation energy and concentration of reactants (correct)
Which observation helps determine a chemical reaction?
Which observation helps determine a chemical reaction?
In a chemical reaction, what happens to reactants?
In a chemical reaction, what happens to reactants?
Why do reaction speeds often increase as temperature rises?
Why do reaction speeds often increase as temperature rises?
What is a chemical reaction?
What is a chemical reaction?
What is the difference between a chemical change and a physical change?
What is the difference between a chemical change and a physical change?
Which of the following is an example of a physical change?
Which of the following is an example of a physical change?
In a chemical reaction, what happens to the constituent atoms of reactants?
In a chemical reaction, what happens to the constituent atoms of reactants?
What occurs during a physical change?
What occurs during a physical change?
Which reaction results in the formation of two new substances?
Which reaction results in the formation of two new substances?
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.
