Ncert Questions Of Class 10th Kit
08.03.2021
All about CBSE Class 10 Science Practicals, Lab Manuals and Project Work
Question 1: 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: Ncert Questions Of Class 10th Kit If the clasz of atoms of 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 Ncert Questions Of Class 10th Kit a Balance equation, the numbers of atoms of different elements on both sides of a chemical equation are equal.
Question 2: Explain the following terms with examples in each case: i Oxidation and ii Reduction. Answer 2: i Ncert Questions Of Class 10th Kit Oxidation: it queations a process a in which oxygen or any qusetions element is added up or b hydrogen or any electropositive element is removed. Examples are: ncert questions of class 10th kit Sulphur burns in the air with a blue flame to form sulphur dioxide. Here oxygen is added up to sulphur.
Question 3: Ncert Questions Of Class 10th Kit Why is respiration considered an exothermic reaction? Answer 3: During digestion, food is broken down into simpler substances. Food like rice, potato and bread are made up of carbohydrates. These carbohydrates are further og down into glucose. Glucose during respiration Ncert Questions Of Class 10th Kit Ncert Questions Of Class 10th Kit inhalation of oxygen is oxidised with the liberation of energy as shown.
Thus, respiration is an exothermic process. Examples are: a Hydrogen reacts with Ncert Questions Of Class 10th Kit chlorine to form hydrogen Ncert Book Questions For Class 10th Forum chloride. Important Questions on 10th Science Chapter Samajik Vigyan 10th Class Book Ncert Kit 1 What is a balanced chemical equation? Why should chemical equations be Ncert Class Kit Of Questions 10th Ncert Questions Of Class 10th Kit 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 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 questjons equal to the total mass of the products.
It questiohs that the total number of atoms of Ncert Questions Of Class 10th Kit each element should be equal on both sides of a chemical equation. Hence, it is for this reason that chemical equations should clasd balanced. Why is respiration considered an exothermic reaction? Energy ncert questions of class 10th kit our body is obtained kti the food we eat. During digestion, large molecules of food are broken down into simpler substances such as glucose.
Glucose combines Ncert Questions Of Class 10th Kit 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 ncert questions of class 10th kit process.
Nert are decomposition reactions called the 10th Class Literature Ncert Solutions Kit opposite of combination reactions? Decomposition reactions Ncert Questions Of Class 10th Kit are those in which a compound breaks down into two or more substances.
These reactions require a source of energy to proceed. Thus, they Ncert Questions Of Class 10th Kit Ncert Questions Of Class 10th Kit are the exact opposite of combination reactions in Ncert Questions Of Class 10th Kit which two or more substances combine to give a new substance with the release of energy. Why do we apply paint fo iron articles? Iron articles are painted 10t applying paints prevents them from rusting. When painted, the contact Ncert Questions Of Class 10th Kit 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 nfert 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 Ncert Questions Of Class 10th Kit Ncert Questions Of Class 10th Kit them rancid.
Thus, bags used in packing food items are flushed with nitrogen gas to remove Ncert Questions Of Class 10th Kit oxygen inside the pack. When ncert questions of class 10th kit is not ncert questions of Ncert Questions Of Class 10th Kit class 10th kit inside the pack, rancidity of Of Questions Class 10th Kit Ncert oil and fat containing food items is avoided.Ncert Questions Of Class 10th Kit
Chapter 2: Acids, Bases and Salts �.
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