Ncert Solutions Class 10th 1.1 Excel
Question ncert solutions Ncert Solutions Class 10th 1.1 Excel class 10th 1.1 excel What is meant by a skeletal chemical equation? Using suitable chemical reaction, differentiate between a skeletal chemical equation and a balanced chemical equation.
Answer 1: If the number of atoms of any element in a chemical equation is not equal on both sides, then it is a skeletal equation. For example:. 10rh, the number of chlorine and hydrogen atoms are ncert solutions class 10th 1.1 excel equal on both sides. In a Balance equation, the numbers of atoms of different elements on both sides of Class 10th Civics Chapter 4 Ncert Solutions a 10fh equation are equal.
Question 2: Explain the following terms with examples in each ncert solutions class 10th 1.1 excel i Oxidation and ii Reduction. Answer 2: i Oxidation: it us a Ncert Solutions Class 10th Exercise 2.4 Cra process a in which oxygen ncert solutions class 10th 1.1 excel any electronegative Ncert Solutions Class 10th 1.1 Excel element is added up ncwrt b hydrogen Ncert Solutions Class 10th 1.1 Excel or any electropositive element is removed.
Examples are: ncret Sulphur burns in the air with a Ncert Solutions Class 10th 1.1 Excel 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 substances. Food like rice, potato and Ncert Solutions Class 10th 1.1 Excel 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 with chlorine to form hydrogen ncert solutions class 10th 1.1 excel. Important Ncert Solutions Class 10th 1.1 Excel Questions on 10th Science Chapter 1 What is a balanced chemical equation? Why should chemical equations be balanced? A reaction which has an Ncert Solutions Class 10th 1.1 Excel equal number of atoms of all the elements on both sides of the chemical equation is called a balanced chemical 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 Ncert Solutions Class 10th 1.1 Excel be equal to the total mass of the products. It means that the total number of atoms of each element should be equal Class Excel 1.1 Solutions Ncert 10th on both sides of a chemical equation. Hence, Ncert Solutions Class 10th 1.1 Excel it is for this reason that chemical equations should be balanced. Why is respiration considered an exothermic reaction?
Energy in our body is Ncert Solutions Class 10th 1.1 Excel obtained from the food we eat. During digestion, large molecules of food are broken down into simpler substances such as glucose. Glucose combines Ncert Solutions Class 10th 1.1 Excel with oxygen in the cells and provides energy.
The special name of this combustion reaction is respiration. Since energy is released in the Ncert Solutions Class 10th 1.1 Excel whole process, it is an exothermic process. Why are decomposition reactions called the opposite of Ncert Solutions Class 10th 1.1 Excel combination reactions?
Decomposition reactions are those in which a compound breaks down into two or more Ncert Solutions Class 10th 1.1 Excel substances. These reactions require a source of energy to proceed. Thus, they are the exact opposite of combination reactions in which two or more substances combine to give a new substance with the release of edcel.
Why do we apply paint on iron articles? Iron articles Excel 10th Class Ncert 1.1 Solutions Ncert Solutions Class 10th 1.1 Excel are painted because applying paints prevents them from Ncert Solutions Class 10th 1.1 Excel Excel Ncert 10th 1.1 Solutions Class 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 and does not easily react with oil and fat containing items. On the other hand, oxygen reacts with food substances and makes them rancid.
Thus, bags used in packing food items are flushed with nitrogen gas to remove oxygen inside the pack. When oxygen is not present inside the pack, rancidity of ncetr and fat containing food items is avoided. Chapter 2: Ncert solutions class 10th 1.1 excel, Bases and Salts �.
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