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NCERT Solutions Class 10 Science - Free PDF Download

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All countries have their own separate educational systems. NCERT is tasked with gathering, writing, editing and publishing various study material and text -books for all the schools that follow CBSE syllabus and pattern. The study matter that is contained in NCERT books are all written and approved by experts in the field. Thus, the knowledge that these books provide is complete and detailed.

The main aim of these books is enriching the knowledge of the children who are taught them and it is made with keeping this in mind. Thus, the books are comprehensive as well as quite easy to understand for the students. Because these books cover an extensive amount of knowledge and go into the depth of the subject they cover, many questions of Board examinations as well as various other competitive examinations are taken with keeping the information present in these books in mind.

Thus, if one is giving Boards examinations or any competitive entrance examinations such as NEET, the medical entrance examination or JEE, the engineering entrance examination, studying these books would be extremely helpful. The main aim of these books is to make the students understand and fully grasp that subject at hand.

To make it simpler for the students, the language used to explain concepts and ideas is easily comprehensible. To supplement various subjects and concepts, NCERT books also provide many diagrams, comics, flowcharts, tables, pictures, etc. This helps the students better understand. Thus, if one wants to increase their basic knowledge in various subjects, NCERT books are the best source. Even if one wants to start studying a particular subject, NCERT books is a great starting point as these books are made with the aim to increase the basic knowledge of the student reading it.

NCERT works along the lines that knowledge and education is extremely important and therefore should be available to all. Thus, it made all books available for free on the internet so that all people who seek knowledge have the resources to do so. Chapter 16 - Management of Natural Resources. A chemical reaction is a change in which one more substance s are reactants s react s to form new compound substance s with entirely different properties.

Reactants are substances like molecules, ions, atoms that react. They undergo a chemical change in the reaction and form a new substance as a result of the reaction.

This new substance formed is called a product. Sodium Water Sodium hydroxide Hydrogen. In the above chemical reaction, sodium and water are the reactants and the products formed as a result of the reaction are Sodium hydroxide and Hydrogen. The following observations can be identified as changes during a chemical reaction:.

A chemical equation is a shorthand form for a chemical change represented by symbols. The reactants and the products obtained as a resultant of a chemical change are represented by symbols and formulas.

Reactants Products. This equation is called the word equation. The word equation can be changed into a chemical equation by writing the formulae and the symbols of the substance instead of their names. Methane Oxygen Carbon dioxide Water. A chemical equation shows a change of reactants to final products through an arrow symbol that is placed between them.

The arrowhead pointing towards the products showing the direction of the reaction. Reactants to yield Products. In the above reaction, the number of Ammonium Hydroxide and Hydrogen Chloride is reacting to form the products Ammonium Chloride and Water. If you observe, in the above equation the number of atoms in the reactants and the products are not the same on both sides. This kind of unbalanced equation is called a skeletal chemical equation.

When the total number of atoms of each element is equal on both sides of the equation then the equation is known as a balanced chemical equation. The balancing of a chemical equation is based on the law of conservation of mass. The method of hit and trial can be used for balancing a chemical equation. In this method, we keep making trials to balance the equation by using the smallest whole number of coefficients.

The number of atoms of each element never changes, before and after a chemical reaction in this method. There are many steps involved in balancing a chemical equation. The first step is to write an unbalanced equation and enclose the formulae in brackets.

Sodium Water Sodium Hydroxide Hydrogen. The second step is to make a list of the number of atoms of different elements as present in an unbalanced equation.

Next step is to balance the first element. From the above table, it is known that atoms in Hydrogen are not balanced. So, first we need to balance it. Atoms of H. In Reactants.

In Products. To balance. Then balance the second element. We examine the obtained equation and select the next unbalanced element. In the above chemical equation, Na is still not balanced. To balance the number of atoms in Na,. Atoms of Na. Thus, after the balancing the Na, we get the final chemical equation:. Further, we have to balance the other elements. If we further examine the reaction, no element is found to be unbalanced.

This method that we used is called the hit and trial method. Finally, we need to check the accuracy of the equation. To check where the equation is correct, we further tabulate the number of atoms of each element separately.

Number of atoms in Reactants LHS. Our solutions not only help you to score good marks but also lay emphasis on understanding the concepts. With a strong foundation in Chemistry, students can excel further when they pursue higher studies for careers in science.

To make it easier for you to study, we cover chapter-wise solutions with step-wise answers for the questions present in the recent NCERT Chemistry textbooks. Now, you can easily understand those elements and prepare for your Chemistry board exam with our chapter-wise Chemistry NCERT textbook solutions.

These solutions by Chemistry experts will help you to study the different types of elements, chemical reactions and more. If you have any doubts while studying, you can ask your doubt on the TopperLearning portal. An academic expert will respond to your query within 24 hours. Enter the OTP sent to your number Change.

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