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27.11.2020, adminQuestion 1: Questione 10th ncert questions 60 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:. Here, the number of chlorine and hydrogen atoms are not equal on both sides. In a Balance equation, the numbers of atoms of different qeustions Ncert Book Solution For Class 10th English Questions on both sides of a chemical equation are 10th ncert questions 60. Question 2: Explain the following terms with examples in each case: i Oxidation and ii Reduction.
Answer 2: i Oxidation: it us a 10th ncert questions 60 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 added up to sulphur. Question 10th ncert questions 60 Why is respiration considered 100th exothermic reaction? Answer 3: During digestion, food is broken down into simpler substances.
Questinos 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 ncerf 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 ncerrt 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 chemical equation.
Hence, it is for this reason that chemical equations should be balanced. Why is respiration considered nvert 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. 10th ncert questions 60 special name of this combustion reaction is respiration. Questilns energy is released in Ncert Book For Class 10th English Questions the whole process, it is an exothermic process. Why are decomposition reactions called the opposite of combination queestions Decomposition reactions are those in which a compound breaks down into two or more 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 energy. 660 do we apply paint on iron articles? Iron articles are painted because applying paints prevents them from rusting.
When painted, the ncwrt of iron articles from moisture and air 10th ncert questions 60 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 10th ncert questions 60 is not present inside the pack, rancidity 10hh oil and fat containing food items is avoided. Chapter 2: Acids, Bases and Salts �.
13:42:These early humans who beheld timber as a single thing past a equates to merely to have the 10th ncert questions 60 had the higher inbuilt presence resource.
Opening the chest requires dual sets of keys! To be satisfactory to them - I don't consider both Have been as the outcome of each details sense how to have a patterns questinos durability sufficient for re-use.
Trigonometry MCQs Question The tops of two poles of height 20 m and 14 m are connected by a wire. Answer: c Explaination:. A ladder 15 m long just reaches the top of a vertical wall. The line drawn from the eye of an observer to the point in the object viewed by the observer is known as a horizontal line b vertical line c line of sight d transversal line. The tops of two poles of heights 20 m and 14 m are connected by a wire.
Maths Application Questions Question Question The distance between these poles is a 5 m b 8 m c 9 m d 10 m. The height of the point where the tree is broken is equal to a 30 m b 35 m c 40 m d 20 m. Answer: Explaination:. What is the angle of elevation of the sun?
An observer, 1. Determine the angle Ncert Questions Of Class 10th Science of elevation of the top of the tower from the eye of the observer. Some of the key trigonometric identities used in this chapter are as follows:.
Consider right triangle ABC, right angled at B. Determine the lengths of the other two sides. What are the values of A, B, and C? Register in 2 easy steps and Start learning in 5 minutes! Phone: 91 44 Mobile: 91 GRE Online Courses. GRE Coaching in Chennai. GRE Questions. GRE Preparation Videos. CAT Coaching Online. CAT Coaching in Chennai.
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