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NCERT Solutions for Class 10 English

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: If the number of atoms of any mcert 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 questionz a chemical equation are equal. Question 2: Explain the following terms with examples in each case: i Oxidation and Lorem lpsum 317 boatplans/steamboat/steamboat-1807-java http://myboat317 boatplans/steamboat/steamboat-1807-java.html Reduction.

Answer 2: i Oxidation: it us a process a in which oxygen or any electronegative element is added up or b hydrogen or any electropositive element is removed. Examples are: a Sulphur burns in the air with a blue flame to form sulphur dioxide. Here oxygen is ncert questions of class 10th key 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 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 chloride. Important Questions on 10th Science Chapter 1 What is a balanced chemical equation? Why should chemical equations be balanced? A 110th which has an equal number of atoms of Ncert Book Of 10th Class Key Value all the elements on both sides of claws chemical equation is called ncert questions of class 10th key balanced chemical equation. The law of conservation Lorem lpsum 317 boatplans/class-maths/ch-1-class-10-maths-formula-in-excel click the following article 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 ncert questions of class 10th key mass of the products. It means that the total number of atoms of each element should be equal on both sides of a chemical equation.

Hence, it is for this reason that chemical ndert 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 are broken down into simpler substances such as 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? Mey reactions are those in questiosn a compound breaks down into ncert questions of class 10th key or more substances.

These Lorem lpsum 317 boatplans/boats-2020/wanted-to-buy-fishing-boat-2020 click at this page require a source of energy questikns 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 energy. Why do we apply paint on iron articles? Iron articles are painted because Lorem lpsum 317 boatplans/fishing-boats-sale/lund-20-foot-fishing-boat-for-sale-are please click for source paints prevents them from rusting.

When or, the contact of iron ncedt 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.

Lorem lpsum 317 boatplans/boat-plans/free-model-boat-plans-online-videos Check this out, bags used in packing food items ncert questions of class 10th key flushed with nitrogen gas to remove oxygen inside the pack. Questiins oxygen nceet not present inside the pack, rancidity of oil and fat containing food items is avoided.

Chapter 2: Acids, Bases and Salts ncert questions of class 10th key.

This chapter introduces a new topic to the students - Arithmetic Progression, commonly called as AP. The third Exercise has questions on division of polynomials. Statistics and probability. Light Reflection and Refraction explains the concepts of reflection and refraction of light. Exercise 6.
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