CBSE Class 10 English Notes And Summary

Question 1: What is meant ncert 10th physics chapters english a skeletal chemical equation? Using suitable chemical reaction, differentiate between a skeletal chemical equation and a English Grammar Book Ncert Class 10th 50 steamboat restaurant marina chemical equation. Answer Ncert 10th Physics Chapters English 1: If the number of atoms of Ncert 10th Physics Chapters English any element in a chemical equation is not equal on both sides, then it is a skeletal equation. For example:. Here, the number of chlorine and hydrogen atoms are not equal on both sides.

In a Balance equation, the numbers of atoms of different elements on both sides of a chemical equation are equal. Question Ncert 10th Physics Chapters English 2: Explain the following terms with examples 10th Chapters Physics Ncert English in each case: i Oxidation and ii Reduction. Answer 2: i Oxidation: it us a process a in which oxygen or any electronegative element is added up or b hydrogen or Ncert 10th Physics Chapters English Ncert 10th Physics Chapters English any electropositive element is removed. Examples are: a Sulphur burns in the air with a blue flame to form sulphur dioxide.

Here oxygen is added up to sulphur. Question 3: Why is respiration considered an exothermic reaction? Answer 3: During digestion, food is broken down into simpler Ncert 10th Physics Chapters English substances. Food like rice, potato and bread are made up of carbohydrates. These carbohydrates are further broken down into glucose.

Glucose during respiration inhalation of oxygen is oxidised with the liberation of energy as shown. Thus, respiration is an exothermic process. Examples are: a Hydrogen reacts Ncert 10th Physics Chapters English with chlorine to form hydrogen chloride.

Important Questions on 10th Science Chapter 1 What is a balanced chemical equation? Why should chemical equations Ncert 10th Physics Chapters English be balanced? A reaction which has an equal number of atoms of all the elements on both sides of the chemical equation is called a balanced ncert 10th physics chapters english Ncert 10th Physics Chapters English equation.

The law of conservation of mass states that mass can neither be created nor destroyed. Hence, in a chemical reaction, the total mass of reactants should be equal to the total mass of the products. It means that the total number of atoms of each element should be equal on both sides of a 10th Ncert English Book Solution Pdf Mac chemical equation.

Hence, it is for this Ncert 10th Physics Chapters English reason that chemical equations should be balanced. Why is respiration considered an exothermic reaction?

Energy in our body is obtained from the food we eat. During digestion, large molecules of food Ncert 10th Physics Chapters English are broken down into simpler substances such as Ncert 10th Physics Chapters English glucose. Glucose combines with oxygen in the cells and provides energy. The special name of this combustion reaction is respiration. Since energy is released in the whole process, it is an exothermic process. Why are decomposition reactions called the opposite of combination reactions?

Decomposition reactions are those Ncert 10th Physics Chapters English Ncert 10th Physics Chapters English in which a compound breaks down into 10th Physics English Ncert Chapters two or more substances. These reactions require a source of energy to proceed. Thus, ncert 10th Ncert 10th Physics Chapters English physics chapters english are the exact opposite of combination reactions in which two or more substances combine to give a new substance ncert 10th physics chapters english the release of energy. Why do we apply paint on iron articles?Ncert 10th Physics Chapters English

Steamboat restaurant marina articles are painted because ncert 10th physics chapters english paints prevents them from rusting.

When painted, the contact of iron articles from moisture and air is cut off. Hence, rusting is prevented their presence is essential for rusting to take place. Oil and fat containing food items are flushed with nitrogen. Nitrogen is an inert gas at room temperature Ncert 10th Physics Chapters English and does not easily react with oil and fat containing items.

On the other hand, oxygen reacts with food substances and makes them Ncert 10th Physics Chapters English rancid. Thus, bags used in packing food items are flushed with nitrogen gas to remove Ncert 10th Physics Chapters English Ncert 10th Physics Chapters English oxygen inside the pack. When oxygen is not Ncert 10th Physics Chapters English present inside the pack, rancidity of oil and fat containing food items is avoided. Chapter 2: Acids, Bases and Salts �.

Sign In Reset Password. Sign In Kindly Sign up for Ncert 10th Physics Chapters English a personalized experience. With the help of concept insights, you will clearly understand how an expert solved the complex questions in Physics. New to TopperLearning? Your Physics revision becomes more effective with our focus on conceptual clarity through our NCERT textbook solutions.
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