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Acid, base and salt class 10 includes topics such as How do Acids and Bases react with each other or metals, Reaction of acid with Hydrogen carbonates and Metallic oxides, Reaction of bases with oxides, etc. In addition to this, the Class 10th Science Chapter 2 includes various interactive activities and interesting topics such as similarities between acid and base and acid or base in a water solution to make the learning process straightforward and easy to understand.
This chapter will also help students learn about salts, their nature, pH, the chemicals that are derived from salt, and the nature and characteristics of salt crystals. All the aforementioned information is thoroughly explained through step by step process in the Ch 2 Science Class 10 Solutions that are designed by India's expert Science teachers to help you in understanding the meaning of basic concepts of acids, bases, and salts class 10 towards performing well in examinations as well as their relation to interesting things that we observe in our daily life.
The Acid, base and salt class 10 is one of the most important chapters as it provides you maximum chances to score high marks in your exams. The unit consisting of the chapter comes for a weightage of 33 marks and the chapter itself for 5 marks in the examination. Through the Class 10 Science Chapter 2 solutions, you will be able to solve questions based on this chapter easily and strengthen the basic concepts of the subject chemistry.
Following are the main headings that are covered under Chapter 2 Science Class 10 acids bases and salts:. Understanding the properties of bases and acids. How do acids and bases respond with metals? How metal carbonates and metal hydrogen carbonates respond with acids? How do acids and bases respond with one another? The response of metallic oxides with acids.
The response of non � metallic oxide with base. What do all acids and bases share for all intents and purposes? 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 reactants and products. The chemical equations should be balanced to satisfy the law of conservation of mass.
Question 5 Translate the following statements into chemical equations and then balance them. Question 9 What does one mean by exothermic and endothermic reactions? Give examples. Answer: Exothermic reactions : Those reactions in which heat is evolved are known as exothermic reactions. Endothermic 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 production 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 simpler 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 heat or light or electricity for breaking down the reactants. Write one equation each for decomposition reactions where energy is supplied in the form of heat, light and electricity.
Question 13 What is the difference between displacement and double displacement reactions? Answer: In displacement reactions, a more reactive metal displaces a less reactive metal from its solution. In double displacement reactions, two reactants in solution exchange their ions. Question 14 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 by 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 coloured compound is copper oxide CuO. The reaction involved is. Question 18 Why do we apply paint on 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 is the process in which metals are eaten up gradually by the action of air, moisture or a chemical such as an acid 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 about 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 a , b and c iv all Solution: i a and b. Question 2 The above reaction is an example of a i. Combination 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 are 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 sides 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 barium 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 8 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 the 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. To make it easier for you to study, we cover chapter-wise solutions with step-wise answers for the questions present in the recent NCERT Chemistry textbooks. Now, you can easily understand those elements and prepare for your Chemistry board exam with our chapter-wise Chemistry NCERT textbook solutions. These solutions by Chemistry experts will help you to study the different types of elements, chemical reactions and more.
If you have any doubts while studying, you can ask your doubt on the TopperLearning portal. An academic expert will respond to your query within 24 hours. Enter the OTP sent to your number Change. Resend OTP. Don't miss this!
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