(2014) (a) Give an example for a combination reaction which is exothermic. (iii) Dilute sulphuric acid reacts with sodium carbonate. (a) In electrolysis of water (H2O), the hydrogen goes to one test tube and oxygen goes to another. (i) Decomposition reaction During combustion the coal burns in air to form CO2, H22 along with the evolution of heat. Free PDF Download - Best collection of CBSE topper Notes, Important Questions, Sample papers and NCERT Solutions for CBSE Class 10 Chemistry Chemical Reactions and Equations. (vi) Combination reaction Question 2. Like if we want to make tea, we add sugar, tea, milk and water. Skeltal chemical equation are unbalanced. (iii) Name the oxidising agent. Substance reduced = Fe2O3 Reducing agent = H2S. (b) Balance the chemical equation given below: Check out this page to learn further in detail: Balancing Chemical Equations, 6. Mention the products formed during the reaction. (c) removal … MCQ Questions for Class 10 Science Chemistry with Answers PDF Download Chapter Wise. Putting the symbols and formulae of all the substances in the above words gives equation, Question 8. Substance reduced = MnO2 (ii) Dil HNO3 cannot be kept in aluminium container because aluminium metal reacts with dil HNO3 to form aluminium nitrate and the hydrogen liberated in this reaction is oxidised to water and nitric acid itself is reduced to any of the oxides of nitrogen. (a) 3MnO2 + 4Al → 3Mn + 2Al2O3 (a) A substance X, an oxide of a metal, is used extensively in the cement industry. (c) (i) The black substance is formed due to the oxidation of copper. Use: This reaction is used in black and white photography. The best ways to excel in school exam as well as in JEE & NEET is to practice questions good questions , entrancei prepared question bank for class 10 students in chapter Chemical Reaction And Equation get Exercise-1 in this page Ans: If the unbalanced chemical reaction is not given, use the components of the chemical reaction that are mentioned and write down the skeletal equation. Answer: In this reaction, Cu is changing into CuO. Question 15. (2015) 7. Substance oxidised = Al This substance is nothing but copper metal. Also a brown substance will be deposited on the iron nail. (2013) Ans: Corrosion is the natural process by which a naturally pure metal converts into a more stable form of itself like sulphide, hydroxide or oxide. An exchange of ions takes place in this reaction. Answer. Find all questions & answers on the chapter with detailed explanation chemical equations & firstname.lastname@example.org Chemistry MCQs Questions for Class 10 with Answers. Out of these solutions which solution, can be kept in the aluminium container? Write the balanced chemical equation for this reaction and state (i) the substance oxidized and (ii) the substance reduced in the reaction. Iron displaces Cu from copper sulphate solution as iron is more reactive than copper. To learn more about important questions in Chemical Reactions and Equations Class 10, register with BYJU’S. Zinc + Sulphuric acid → Zinc sulphate + Hydrogen The oxidizing agent supply the oxygen in a … Answer: From the question, we infer the unbalanced chemical equation is: Br 2 + Na 2 CO 3 → NaBr + NaBrO 3 + CO 2 Balanced equation is: 3 Br 2 + 3 Na 2 CO 3 → 5 NaaBr + NaBrO 3 + 3 CO 2 It means 5 molecules of NaBr are obtained. (b) dilute hydrochloric acid reacts with sodium carbonate (iv) CuSO4 + Zn → ZnSO4 + Cu (i) Digestion of food in stomach Rusting is the specific name given to the corrosion of iron. … (2013) This document is highly rated by Class 10 students and has been viewed 101266 times. Consider the Chemical equation given below and answer the questions that follow. Chemical Reactions and Equations Chapter Wise Important Questions Class 10 Science NCERT Solutions Sample Papers NCERT Exemplar Solutions . (2014) Now place this china dish in sunlight for some time. (iii) On heating green ferrous sulphate crystals, reddish brown solid is left as residue and a gas having smell of burning sulphur is evolved. Identify the type of reaction in the following example: 1.“We need to balance a skeltal chemical equation.” Give reason to justify the statement. This will clear students doubts about any question and improve application skills while preparing for board exams. Why chemical equations are balanced? Thus, it is a type of exothermic decomposition reaction. Register online for Science tuition on Vedantu.com to score more marks in CBSE board examinations. Ans: A single displacement reaction is a reaction in which the one or more elements replaces another element in a compound. Therefore it is a combination reaction which is exothermic. (b) (i) When potassium iodide solution is added to lead nitrate solution, then a yellow precipitate of lead iodide is produced along with potassium nitrate solution. Question 9. The entire NCERT textbook questions have been solved by best teachers for you. 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The deep blue colour of copper sulphate solution fades due to the formation of light green solution of iron sulphate. Required fields are marked *, Chemical Reactions And Equations Class 10 Questions Answers. The balanced chemical equation is: 2Mg(s) + O 2 (g) 2MgO(s) Yes, magnesium (Mg) gets oxidised to form magnesium oxide (MgO) in this reaction. Magnesium ribbon burns with a dazzling flame in air (or oxygen) and changes to a white substance magnesium oxide. The pre foundation courses offered by us are prepared by best faculties from all over India. You are provided with a container made up of aluminium. (ii) Displacement reaction The subscript of an element represents the rate of the number of atoms. Let us consider the example of an electrochemical cell-like redox reaction between Zinc and Hydrogen. Free PDF download of Important Questions with solutions for CBSE Class 10 Science Chapter 1 - Chemical Reactions and Equations prepared by expert Science teachers from latest edition of CBSE(NCERT) books. 2 g of ferrous sulphate crystals are heated in a boiling tube. Lime is used as a reagent in laboratories for dehydration, precipitation, etc. Class 10 Chemistry Chapter 1 Important Questions with Answers Chemical Reactions and Equations, Question 1. B. Slaked Lime. Write balanced chemical equations for the following statements: Consider the example of the decomposition of calcium carbonate giving out CaO (Quick Lime) which is a major component of cement. Get Free NCERT Solutions for Class 10 Science Chapter 1 Chemical Reactions And Equations. Examples of an exothermic reaction are rusting iron, settling, chemical bonds, explosions, nuclear fission whereas some examples of an endothermic reaction are melting ice, evaporation, cooking, gas molecules, photosynthesis. Why is silver bromide stored in dark bottles in the laboratories? (iv) Combination reaction According to law of conservation of mass, “Matter can neither be created nor destroyed in a chemical reaction Therefore the chemical equations are balanced to satisfy the law of conservation of mass in chemical reactions. (v) Quicklime reacts vigorously with water releasing large amount of heat. The chemical equation does not give any information regarding the speed of reaction. Ch2 - Acids, Bases and Salts (MCQs) 7. Ch 1 - Chemical Reaction (Assertion Type Reasoning Quiz) 5. BaCl2 (aq) + Na2SO4 (aq) → BaSO4 (s) + 2 NaCl (aq). d) Combustion reaction: A combustion reaction is a reaction with a combustible material with an oxidizer to give an oxidized product. With the class 10 science syllabus being vast covering topics like the Periodic classification of elements, Carbon compounds, Metals and non-metals, Acids, bases and salts, and more, it is important that a student must learn all the important questions and topics which usually tend to repeat through the years in the university papers. This element is found in our bones also. (i) ZnCO3 (s) → ZnO (s) + CO2 (g) answer: How many number of sodium bromide molecules obtained in the balanced chemical equation. Identify the type of chemical reactions in the following processes: (2014) Students can solve NCERT Class 10 Science Chemical Reactions and Equations Multiple Choice Questions with Answers … (i) The colour of the ferrous sulphate crystals is green before heating and changes to brown after heating. On heating, it turns into tea. But the case with oxygen is different as it makes food rancid by reacting it with food items. Your email address will not be published. (b) What changes in the colour of iron nails and copper sulphate solution do you observe after keeping the iron nails in copper sulphate solution for about half an hour? Question 2. Balbharati solutions for Science and Technology Part 1 10th Standard SSC Maharashtra State Board chapter 3 (Chemical reactions and equations) include all questions with solution and detail explanation. Chemical Reactions and Equations Extra Questions Long Answer Type. Reducing agent = Al, (b) Iron when in contact with air moisture or water, corrodes and forms rust. Free PDF Download of CBSE Class 10 Science Chapter 1 Chemical Reactions and Equations Multiple Choice Questions with Answers. Video | EduRev is made by best teachers of CBSE/Schools. Now take note of how many atoms are on each side of the reaction of each element. Heated strongly, it decomposes to form Phosphorus pentachloride and a base giving salt and water Bank for 10th Science... 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