10 Questions
Which of the following best describes a chemical reaction?
The transformation of a substance into a new and completely different substance
What is the term used to describe the substances that take part in a chemical reaction?
Reactants
In the context of chemical reactions, what does the evolution of gas typically indicate?
The occurrence of a chemical reaction
What is the purpose of cleaning the magnesium ribbon before burning it in air?
To remove the protective layer of basic magnesium carbonate
What is the main purpose of a chemical equation?
To represent a chemical reaction using symbols and formulae
What is the difference between a balanced and unbalanced chemical equation?
The balanced equation has equal numbers of atoms of each element on both sides, while the unbalanced equation does not
Which characteristic of a chemical reaction is NOT represented by a chemical equation?
Change in state of substance
What do the reactants and products represent in a chemical equation?
Reactants represent the substances before the reaction, while products represent the substances after the reaction
Which law is adhered to when creating a balanced chemical equation?
Law of Conservation of Mass
What type of information is generally written above the arrow in a chemical equation?
Conditions for the reaction to occur
Learn about chemical reactions and their examples in Class 10. Understand how new substances are formed in a chemical reaction and the changes that occur at the atomic level.
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