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L4 : Chemical Equation - Chemical Reaction, Science, Class 10 Video Lecture - Class 12

FAQs on L4 : Chemical Equation - Chemical Reaction, Science, Class 10 Video Lecture - Class 12

1. What is a chemical equation?
Ans. A chemical equation is a symbolic representation of a chemical reaction. It shows the reactants on the left side and the products on the right side, separated by an arrow. The equation also includes coefficients, which represent the relative amounts of each substance involved in the reaction.
2. What is a chemical reaction?
Ans. A chemical reaction is a process that leads to the transformation of one set of chemical substances into another. It involves the breaking of chemical bonds in the reactants and the formation of new bonds in the products. Chemical reactions can be classified into various types, such as synthesis, decomposition, combustion, and displacement reactions.
3. How do you balance a chemical equation?
Ans. Balancing a chemical equation involves adjusting the coefficients in front of the reactants and products to ensure that the number of atoms on both sides of the equation is equal. The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction, so the total number of atoms of each element must be the same on both sides. This is achieved by changing the coefficients while not altering the subscripts.
4. What are the types of chemical reactions?
Ans. There are several types of chemical reactions, including: 1. Synthesis reaction: Two or more substances combine to form a single product. 2. Decomposition reaction: A single compound breaks down into two or more simpler substances. 3. Combustion reaction: A substance reacts with oxygen, typically producing heat and light. 4. Displacement reaction: An element or ion in a compound is replaced by another element or ion. 5. Acid-base reaction: An acid reacts with a base, forming a salt and water.
5. Why are chemical equations important?
Ans. Chemical equations are important because they provide a concise and systematic way to represent chemical reactions. They allow scientists to communicate and understand the reactants, products, and stoichiometry (relative amounts) of substances involved in a reaction. Chemical equations also enable the prediction of products and the calculation of quantities in chemical reactions, which is crucial in various fields such as pharmaceuticals, environmental science, and industrial processes.
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