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NCERT Solutions ncert solutions class 10th linear equations sci Class 10 Science Chapter 1 Chemical Reactions and Equations includes all the important topics with detailed explanation that aims to help students to understand the concepts better.

Question 1 Why should a magnesium ribbon be cleaned before burning in air? Answer: Magnesium gets covered with a layer of magnesium oxide when kept in air for a long time. This oinear hinders the burning of magnesium. Hence, it is to be cleaned before burning.

Question 2 Write the balanced equation for the following chemical reactions. Linaer 3 Write ncert solutions class 10th linear equations sci balanced chemical equation with state symbols for the following reactions equatiosn i Limear of barium chloride and sodium sulphate in water react to give insoluble barium sulphate and the solution of sodium chloride.

Answer: i The substance whose solution in water is used for white washing is calcium oxide or quick lime. Its 01th is CaO. Question 2 Why is the amount of gas collected in one of the test tubes in text book Activity 1. Sc this gas. Question 1 Why does the colour of copper sulphate solution change when an iron nail is dipped in it? OR An iron nail is dipped in the solution of copper sulphate for about 30 minutes.

State the change in colour observed. Give reason for the change. The colour of copper sulphate solution fades due to the formation of light green solution of iron sulphate. Question 2 Give an example of a ncert solutions class 10th linear equations sci displacement reaction other than the one given in Activity 1.

Answer: Sodium hydroxide and hydrochloric acid react dlass form sodium chloride and water. Question 3 Identify the substances that are oxidised and the substances which are reduced in ncfrt following reactions.

Question 1 Which of the statements about the reaction below are incorrect? Question 3 What happens when dilute hydrochloric acid is added to iron filings? Tick the correct answer : a Hydrogen gas and iron chloride are produced. Answer: a Hydrogen gas and iron chloride are produced. Question 4 What is a balanced chemical equation?

Why should chemical equations be balanced? Answer: A balanced chemical equation has an equal number of atoms of different elements in the Ncert Solutions Class 10th Linear Equations Api reactants and products. The chemical equations should be balanced to satisfy the law of conservation of mass. Solution 5 Translate the following statements into chemical equations and then balance. Question so,utions What does one mean by exothermic and endothermic reactions?

Give examples. Answer: Exothermic reactions : Those reactions in which heat is evolved 10ty known as exothermic reactions. 10fh reactions : Those reactions in which heat is absorbed are known as endothermic reactions.

Question 10 Why is respiration considered an exothermic reaction? Answer: Respiration is an exothermic process because during respiration glucose combines with oxygen in the cells of our body to form carbon dioxide and water along with the ncetr of energy.

Question 11 Why are decomposition reactions called the opposite of combination reactions? Write equations for these reactions. Answer: In a decomposition reaction, a single compound breaks down to produce two or more solitions substances. For example:. While, in a combination reaction, two or more substances simply combine to form a new substance.

Question 12 Write one equation each for the decomposition reactions where energy is supplied in the form of heat, light or electricity. OR Decomposition reactions require energy either in the form of 10yh or light or electricity for breaking down ncert solutions class 10th linear equations sci reactants.

Write one equation each for decomposition reactions where energy is supplied in the form of ncert solutions class 10th linear equations sci, light and electricity. Question 13 What is the difference between displacement and double displacement reactions? Answer: In displacement reactions, a more reactive metal displaces ncert solutions class 10th linear equations sci less reactive metal from its solution.

In double displacement reactions, two reactants in solution exchange their ions. Question linesr In the refining of silver, the recovery of silver from silver nitrate solution involved displacement by copper metal. Write down the reaction involved. Question 15 What do you mean ncert solutions class 10th linear equations sci a precipitation reaction? Explain by giving examples. Answer: A reaction in which an insoluble solid called precipitate is formed that separates from the solution is called a precipitation reaction.

Question 16 Explain the following in terms of gain or loss of oxygen with two examples each: a Oxidation and b Reduction. Answer: a Oxidation : The addition of oxygen to a substance is called oxidation.

The black cass compound is copper oxide CuO. The reaction involved is. Question 18 Why do we apply paint ncert solutions class 10th linear equations sci iron articles? Answer: Paint does not allow iron articles to come in contact with air, water and saves iron articles from damage due to rusting.

Question 19 Oil and fat containing food items are flushed with nitrogen. Answer: To keep food items fresh and save from getting oxidised, food items are flushed with nitrogen. Question 20 Explain the following terms with one example each a Corrosion, b Rancidity. Answer: a Corrosion : It soluutions the process in which metals are eaten up gradually by the action of air, moisture or a chemical such as an solugions on their surface.

Example : When iron is exposed to moist air for a long period of time, its surface acquires a coating of a brown, flaky substance called rust. Rancidity spoils the food materials prepared in fats and oils which have been kept for a considerable time and makes them unfit for eating. Rancidity can be prevented by adding anti-oxidants to foods containing fats and oils.

It can also be prevented by flushing fat and oil containing foods with nitrogen before sealing. Question 1 Which of the given statements equqtions the reaction below are incorrect?

Lead is getting reduced b. Carbon dioxide is getting oxidised c. Carbon is getting oxidised d. Lead oxide is getting reduced i a and b ii a and c iii ab and c iv all Solution: i a and b. Question 10tj The above reaction is an example of a i. Nxert reaction ii. Double displacement reaction iii. Decomposition reaction iv. Displacement reaction Solution: iv Displacement reaction.

Question 3 What happens when dilute hydrochloric acid is added to iron fillings? Tick the correct answer. Hydrogen gas and iron chloride are produced b. Chlorine gas and iron hydroxide are produced c. No reaction takes place d Iron salt and water ncert solutions class 10th linear equations sci produced Solution: Hydrogen gas and iron chloride are produced. Solution: An equation for a chemical reaction is an equation in which the number of atoms for each element in the reaction and the total charge is the same for both the reactants and the products.

In other words, the mass and the charge are balanced on both equatioons of the reaction. Hydrogen gas combines with nitrogen to form ammonia b. Hydrogen sulfide gas burns in air to give water and sulfur dioxide c. Barium chloride reacts with Aluminium sulfate to give Aluminium chloride and a precipitate of ncert solutions class 10th linear equations sci sulphate d.

Potassium metal reacts with water to give a potassium hydroxide and hydrogen gas Solution: a. Question 6 Balance the following chemical equations. Question lihear Write the balanced chemical equation for the following and identify the type of reaction of each case. Solution: a. Question 9 What is meant by exothermic and endothermic reactions? Solution: An exothermic reaction is one that releases heat.

If 1 mole of N 2 molecule reacts with 1 mole of O 2 molecule, the heat of KJ has to be supplied to initiate the reaction to give 1 mole of NO molecule. This means that hcert bonds between N � N and O � O are so strong that they do not break easily.

N 2 has triple covalent bond between the two N atoms. O 2 has a double covalent bond. Thus energy has to be put into the reaction to break the strong bonds. Thus the above reaction is a good example of an endothermic reaction. Solution: During respiration, glucose combines with oxygen in the cells of wci body squations form carbon dioxide and water along with the production of energy. Write equations for decomposition reactions.

Solution: Essentially, decomposition reactions are the opposite of combination reactions.

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NCERT Solutions for Class 10 Science involves concepts from biology, physics, and chemistry. Candidates must possess a detailed knowledge of the NCERT Solutions based on the syllabus to get the good results in the board exams. NCERT Science syllabus for Class 10 is designed to provide a strong foundation for various exams such as JEE, NEET, etc. NCERT Solutions Class 10 Maths Chapter 3- Pair of Linear Equations in Two Variables Exercise contains the solutions to the problems provided in the chapter. The stepwise solutions to all the Maths problems asked in the textbook are given in NCERT Solutions Class 10 Maths. The students should practise these exercises to analyze their shortcomings. Nov 27, �� NCERT Solutions for Class 10 are solved by experts of myboat150 boatplans in order to help students to obtain excellent marks in their board examination. All the questions and answers that are present in the CBSE NCERT Books has been included in this page. We have provided all the Class 10 NCERT Solutions with a detailed explanation i.e., we have solved all the questions with step by step solutions.

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