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The 6th chapter of Class 10 Science is of Biology and it deals with different processes of life such as Respiration, Transpiration, Nutrition, Excretion, and much more in plants and human beings. The chapter consists of 34 different questions and from these questions, some are objective while others are long-answer type questions. Students can use these questions and get their solutions from our official site to make sure that they are able to score better marks than the others in their examinations.
We are pretty sure that this is going to help a lot. In this chapter, students will get to have a deeper understanding of topics such as the nervous system in the body of human beings. Also, they will get to know about the anatomy of the human brain along with the coordination of hormones in animals. The chapter includes about 12 different questions and there are some objective-type options for the students to choose from as well.
Go and refer to the NCERT solutions for class 10 science right now to get the best results in your exams. In the 8th chapter of the book, we provide some explanation about the process of reproduction that takes place in single-celled organisms and multi-celled organisms as well. The chapter explains the different types of reproduction such as sexual and asexual.
Also, there are details about the reproductive systems in plants as well as animals. There are about 11 questions in this chapter and there are some exercises as well. So, students will get to learn a lot from these chapters in the best way. This chapter in the science book deals with the passing of genes between different generations. Also, the chapter provides information on the process of sex determination.
The chapter has details on the entire concept of Evolution with the help of the Charles Darwin theory. Students can get familiar with the concepts and then attempt to solve the questions that are provided in the chapter. There are about 12 questions in it along with end exercises as well. After reading this chapter, the students will get to know about the different phenomena that the light has to go through. Refraction and reflection are the important topics in this chapter and there are several explanations to these the laws of refraction and reflection.
There are also some mathematical elements in the chapter that are explained well in our solutions. The chapter includes 17 different questions along with an end exercise for the students.
The first 5 questions included in the chapter tend to be objective. This is a chapter that will primarily focus on the human eye structure as well as the various functions that are included in every single part of the eye.
Also, there are some explanations regarding the different eye problems that people might have in their life. There are about 13 questions present in the chapter. Also, there are diagrams that students need to study so that they can score better marks in their exams. This chapter is really important as all the answers are based on the details provided in the chapter.
For this chapter, students will dive into the different concepts of electric current. They will also get to learn important terms such as potential difference, resistance, circuit diagrams, and much more. Also, students will know about the different effects of heating on electrical power and current.
Not to mention that students will get to understand the different symbols used in a circuit diagram. Also, there are some details about the current flow that occurs in a particular circuit and much more.
The 13th chapter of Class 10 science deals with important topics such as magnetic fields and different field lines. Also, students can learn about hard rules, the force on a particular type of current conductor, magnetic fields, and circuits. The chapter is meant to provide an insight into topics such as generators, motors, electromagnetic inductions, and much more. There are 18 questions in the chapter along with a few objective types as well. In the exercises for this chapter, students will also find several numerical solutions.
Students will know about different energy forms that are available to mankind such as non-conventional and conventional forms of energy. There are comparisons between different energy forms and the explanations are provided in the chapter. Also, students will get to know the importance of using several non-conventional types of energy rather than the conventional options.
There are 10 questions in this chapter and some of them are objective types. There are several ecosystems working in the environment and students will get to know about keeping it stable and balanced. There is also information about ozone layer depletion, food chains, and management of waste.
The chapter has a total of 9 questions and 3 are objective ones. The chapter goes through important topics such as management and preservation of different resources that include petroleum, coal, wildlife, forests, and much more. The chapter consists of 7 questions and students can find all the answers to these questions in our PDF files for the solutions.
Unit Name. World of living. Natural Phenomena. Effects of Current. Natural Resources. Total Marks. Type of Questions. Objective Type. Short Answer Type. Long Answer Type. These solutions will help you prior to your exams as you can know more about the marking scheme, question pattern, difficulty level and nature of questions, section-wise marking and so much more. Here are some benefits of referring to these solutions. By knowing the pattern of different questions that come in the examination, students can easily make sure that their preparation is on point.
This way they are more confident and sure about taking the board exam and hence they get to score more marks. It cannot be denied that time management gets better and better with more practice as it helps in boosting the speed of answering the questions during your exams. So, with total awareness of the answers with the solutions provided by us, you can efficiently manage time.
One of the best things about the NCERT solutions that we have for class is that these answers are prepared by teachers and masters who have enough experience in teaching the subject. Hence, the details and the accuracy of the chapters are undeniable for sure. Question 2 Give an example of a double displacement reaction other than the one given in Activity 1. Answer: Sodium hydroxide and hydrochloric acid react to form sodium chloride and water. Question 3 Identify the substances that are oxidised and the substances which are reduced in the 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 reactants and products.
The chemical equations should be balanced to satisfy the Class 10th Science Chapter 3 Ncert Solutions Network 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. Thus the above reaction is a good example of an endothermic reaction. Solution: During respiration, glucose combines with oxygen in the cells of our Ncert Solutions For Class 10th Science Chapter 7 Word body to 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.
A compound decomposes i. Most decomposition reactions are endothermic. Another example of decomposition reaction is the heating of calcium carbonate sea shells, chalk :. Question 12 Write one equation each for decomposition reactions in which energy is supplied in the form of heat, light or electricity?
Solution: When calcium carbonate is heated, it decomposes to give calcium oxide and carbon dioxide:. Write relevant equations for the above? Solution: The difference between the displacement and double displacement reactions is that in a displacement reaction one element displaces another by virtue of it being more reactive whereas in a double displacement two anions and two cations switch places between two compounds respectively. Thus Zn displaces Cu in the salt form. Zn is more reactive than Ncert Solutions For Class 10th Science Chapter 2 Date Cu.
Question 14 In the refining of silver, the recovery of silver from silver nitrate solution involves displacement by copper metal. Explain by giving examples: Solution: A precipitation reaction is a reaction in which soluble ions in separate solutions are mixed together to form an insoluble compound that settles out of solution as a solid.
This insoluble compound is called a precipitate. An example of a precipitation reaction Aqueous silver nitrate AgNO3 , when added to a solution containing potassium chloride KCl , precipitates a white solid, and silver chloride is observed. Solution: The shiny brown colored element X is copper metal Cu. When copper metal is heated in air, it forms a black colored compound copper oxide. So, the black colored compound is the copper oxide or copper II oxide, CuO.
Question 17 Why do we apply paint on iron articles? Solution: Rust is a soft and porous substance, which gradually falls from the surface of an iron object, and then the iron below starts rusting. Thus, rusting of iron or corrosion of iron is a continuous process which, if not prevented in time, eats up the whole iron object. So, when we apply paint on iron articles it reduces the rusting of iron. Question 18 Oil and fat containing food items are flushed with nitrogen.
Solution: Packaging fat and oil containing foods in nitrogen gas can prevent rancidity. When the fat and oil present in food materials gets oxidised in air , their oxidation products have an unpleasant smell and taste.
When it is surrounded by unreactive gas, nitrogen, there is no oxygen of air to cause its oxidation and make it rancid. Question 19 Explain the following terms with one example each. Corrosion b. Rancidity Solution: a. Corrosion is the process in which metals are eaten up gradually by the action of air, moisture or a chemical on their surface.
Corrosion is caused mainly by the oxidation of metals by the oxygen of air. Example: Rusting of iron is the most common form of corrosion. This is called rusting of iron. The condition produced by aerial oxidation of fat and oil in food which is marked by an unpleasant smell and taste is called rancidity.
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