When sodium carbonate is dissolved in water, it gets hydrolysed to some extent and forms sodium hydroxide and carbonic acid. Acids, Bases and Salts Class 10 MCQs Questions with Answers. You have been provided with 3 test tubes. Some hydrated salts lose water of crystallization on heating and become anhydrous. Answer: Question 4. (a) Write the chemical name and chemical formula of washing soda. Salts can be acidic, basic or neutral. They will not separate to become hydrogen ions, on dissolving in the water. NCERT Solutions for Chapter 2 Acids, Bases and Salts is helpful in last minute question and Answers which has been provided here. If yes, then why are these basic? 2NaCl (aq) + 2H2O (l) → 2NaOH (aq) + Cl2(g) + H2 (g) Answer: 1. Access Answers of Science NCERT class 10 Chapter 2 – Acids Bases and Salts. Pass the gas produced in each case through lime water as shown in the figure. The pH of solution A is 6 and pH of solution B is 8. Write the chemical name of Plaster of Paris. Give two examples of organic acids. Also list two other uses of the compound. 5. Ans1. (b) Solution A gives pink colour when a drop of phenolphthalein indicator is added to it. CBSE Class 10 Chemistry Hots-Acids Bases and Salts. This can be prevented by cleaning the mouth and teeth using toothpaste which are generally basic and can neutralize the excess acid. According to new CBSE Exam Pattern, MCQ Questions for Class 10 Science pdf Carries 20 Marks. Answer: Stomach acts in slightly acidic medium while small intestine digests the food in slightly alkaline medium. LONG QUESTIONS & ANSWERS Q1. pH of solution A = 3, Answer: Created by the Best Teachers and used by over 51,00,000 students. On the other hand, carbonic acid is a weak acid which is only slightly ionised and hence gives a small amount of hydrogen ions [H+ (aq)]. Thus, A will have pH more than 7 because pH value of. Give an example. This time bulb glows. Explain why? Q1. Dry HCl gas does not change the colour of dry blue litmus paper because it has no hydrogen ions [H+ (aq)] in it. Example, Na. Question 2. 6. The dry HCl does not change the colour of dry litmus paper as it needs moisture or water for its acidic action. Solution: The acidic behaviour from acids is because of the presence of hydrogen ions. Topics involved in Chapter 2 – Acid, bases and salts. How will you test for the presence of this gas? Name the reactant and the product and mention one use of the product. How will you test the evolution of this gas? Answer: Question 8. INTEXT QUESTION – Page No.- 18. Answer: Related Questions. Solution: When an acid reacts with any metal, salt and hydrogen gas are formed. (c) Washing soda is a basic salt because it is a salt of a strong base (NaOH) and weak acid (H2CO3) with pH value more than 7. Write the characteristics of acids by which we can identify acids. The pH of solution A is 6 and pH of solution B is 8. It is used in the manufacture of borax compound. Solution A is more acidic as solution A has more hydrogen ion concentration, because the pH of a solution is inversely proportional to the concentration of hydrogen ions in it. What is a neutralisation reaction? What effect does the concentration of H+(aq) ions have on the nature of the solution? Solution : Ca(OH) 2 +CO 2 →CaCO 3 +H 2 O. Question 2. Solution: We can identify the content in each of the test tubes using red litmus paper. Acids, Bases and Salts Class 7 Science Extra Questions Short Answer Type Questions. With the help of chemical equation, explain the method of preparation of both Na2CO3.10H2O and Na2CO3. (b) Solution A gives pink colour when a drop of phenolphthalein indicator is added, therefore A is a base. Write a chemical equation to describe how baking soda is produced on a large scale. Use: Washing soda is used for softening hard water. Categories NCERT Sol. pH of solution B = 5 When it changes into curd (yoghurt), will its pH value increase or decrease? Raju while cleaning the floor with hydrochloric acid observing the bottle. Hence, they do not conduct electricity. This will turn plaster useless. (i) The acid is to be added slowly in water to prevent the mixture to be splashed. H 2 SO 4 + Zn → ZnSO 4 + H 2 Acids + Metal Carbonate/Metal hydrogen Carbonate = Salt + CO 2 e.g NaHCO 3 + HCl → NaCl + H 2 O + CO 2 Acids + Bases → Salt … Class 10 Chemistry Chapter 2 Important Questions with Answers Acids, Bases and Salts. We hope students must have found these “CBSE Class 10 Science Important Questions Chapter 2 Acid, Bases, and Salts” useful for exam prepration. Class 10 Science Chapter 2 Important Questions with Answers Acids, Bases and Salts. to make students understand the basic concepts. This is based according to the latest pattern released by CBSE. If we take 20 mL of the same solution of NaOH, the amount HCl solution (the same solution as before) required to neutralise it will be. What is the common name of the compound CaOCl2? On the other hand, bases are substances that produce ions when mixed with water. This activity shows that metal carbonates and metal hydrogen carbonates react with acids to form salt, CO2 and water. Question 6. We hope students must have found these “CBSE Class 10 Science Important Questions Chapter 2 Acid, Bases, and Salts” useful for exam prepration. QUESTIONS 2004 Question 1. 4. (iii) State two prop… Which solution will be basic in nature? (a) Universal indicator is a mixture of many different indicators which gives different colours at different pH values of the entire pH scale. Compounds similar to glucose or alcohol do contain hydrogen element but they do not show signs of acidic nature. (2014) Washing soda is used in the glass, soap and paper industries. Solution B gives red colour when a drop of methyl orange is added to it. Solution: Answer is 10 because litmus paper turns blue when reacts with basic solution (PH more than 7). Acids, Bases and Salts Notes of CBSE Class 10 Science Chapter with detailed explanation of the chapter ‘Acids, bases and salts' along with meanings of difficult words. Q41: What are mineral acids? What are the differences between exothermic and endothermic reaction? Solution: In increasing order of hydrogen ion concentration: pH 11(B) -> pH 9(E) -> pH 7(A) -> pH 4(D) -> pH 1 (B). Use: Plaster of Paris is used in hospitals for setting fractured bones in the right position to ensure correct healing. Answer: (c) Name one salt whose solution has pH more than 7 and one salt whose solution has pH less than 7. Why does an aqueous solution of an acid conduct electricity? Here you can get Class 10 Important Questions Science based on NCERT Text book for Class X. This chapter gives you an insight into the very important class of chemicals; acids, bases and salts encountered in daily life. (a) Why does he shift the pH of the fresh milk from 6 to slightly alkaline? A milkman adds a very small amount of baking soda to fresh milk. Identify the acid and the base and tabulate your answer in the format given below: Answer: When baking powder mixes with water (present in dough made for baking cake or bread), then sodium hydrogen carbonate reacts with tartaric acid to evolve CO2 gas. APlusTopper.com provides ICSE Solutions for Class 10 Chemistry Chapter 3 Acids, Bases and Salts for ICSE Board Examinations. citric acid present in fruits like lemon, oxalic acid in tomato etc. Understanding the chemical properties of bases and acids. Solution: Insert two nails on the wooden or rubber cork and place them on a beaker as shown in figure. Fresh milk has a pH of 6. Solution: Common name of CaOCl2 is bleaching powder. Your email address will not be published. Hence, solution A will have a higher hydrogen ion concentration. Two solutions A and B have pH values of 5 and 8 respectively. Solution B will be basic in nature as its pH value is 8. (a) Write the name given to bases that are highly soluble in water? This is also one of the important chapters as the chances of scoring full marks on questions from this chapter are more. They are sour in taste. This stain turns to yellow again when the cloth is rinsed with plenty of water because then the basic soap gets removed with water. Acids, Bases and Salts class 10 questions and answers NCERT Solutions for Class 10 Science Chapter 2 Acids, Bases and Salts of Intext questions NCERT Solutions for Class 10 Science Chapter 2 on Page No: 18 Ques 1: You have been provided with three test tubes. (i) Dry HCl gas does not contain any hydrogen ions in it, so it does not show acidic behaviour. Answer: Acids obtained from living beings (plants and animals) are called organic acid. If used on washing car then it will remove dead bug bodies without damaging the colour or the paint on the car. BYJU’S is India’s top education technology company which believes in a modern learning approach. The NCERT Solutions to the questions after every unit of NCERT textbooks aimed at helping students solving difficult questions.. For a … Explain the process of neutralisation with the help of an activity. Free download Acids Bases and Salts Class 10 Important Question Answers.Ribblu launches platform for supplying free download of CBSE Sample board exam papers & worksheets from nursery to class … Acids Bases and Salts Trivia Questions and Answers PDF. Solution: Basic solutions has H+ ions, but hydroxide ions present in basic solution are more in basic solution. Solution: (a) He shifted the pH of the fresh milk from 6 to slightly alkaline to prevent milk from getting sour due to production of lactic acid. Solution: The substance which on treatment with chlorine yields bleaching powder is Calcium hydroxide. 2. If bubbles are developed then the soil Is too acidic. Answer: With examples. Solution: The chemical equation for the reaction of Plaster of Paris and water is, 1. If Hydrogen ion concentration increase then solution turn acidic and similarly if Hydrogen ion concentration decreases then solution turn basic. Lime water in each case will turn milky due to the production of CO2 gas in each of the test tubes. Science Class 10 Important Questions are very helpful to score high marks in board exams. (a) dilute sulphuric acid reacts with zinc granules: => dilute sulphuric acid + zinc → Zinc Sulphate + Hydrogen Gas. They turn blue litmus paper/solution to red. ... 10,000+ Daily Practice Questions (only at ₹ 299/- in myCBSEguide App) Demo Video Install Now. NaHCO3 on heating produces Na2CO3 (Sodium carbonate, called soda ash) which on recrystallization produces washing soda. Solution: Fresh milk is turned to curd due to production of lactic acid. Test for hydrogen gas: Take about 5 ml of dilute sulphuric acid in a test tube and add a few pieces of zinc granules to it. Basic solution has a pH value more than 7. Class 10 Science Chapter 2 Extra Questions and Answers Acids Bases and Salts. Which solution has more hydrogen ion concentration? Illustrate with an example. One can perceive different kinds of reactions involved with acids, bases and salts. Question 4. Which solution is. Given here is the complete explanation of the chapter, along with examples and all the exercises, Question and Answers … Hence the reaction between Calcium Carbonate and HCl is, CaCO3 (s) + 2HCl (Aq) → CaCl2( Aq) + CO2 (g) + H2O (l). Name the substance which on treatment with chlorine yields bleaching powder. Salts of strong acids and weak bases … The three test tubes contain distilled water, acidic solution and the basic solution respectively. Give reason for your answer. The solutions are completely based on the latest syllabus and guidelines of the CBSE board. If other two test tubes do not change the colour of blue litmus paper, it shows that one of them contains a base and the other contains distilled water. Why do HCl, HNO3, etc., show acidic characters in aqueous solutions while solutions of compounds like alcohol and glucose do not show acidic character? Mark them as ‘A’ and ‘B’. In this chapter, students will learn about the nature and behaviour of Acids, bases and salts. Question 6. Acids Bases and Salts Extra Questions Very Short Answer Type. The solution contains When electricity is passed through a concentrated solution of sodium chloride (called brine), it decomposes to form sodium hydroxide, chlorine and hydrogen gas. The salts of strong acids and weak bases give acidic solution having pH less than 7. 9. 10 mL of a solution of NaOH is found to be completely neutralised by 8 mL of a given solution of HCl. (c) Why it is called a basic salt? Answer: There is only red litmus paper available in order to identify what is there in each test tube. Tags acids bases and salts class 10 questions and answers, ncert class 10 science chapter 2 exercise solutions, Ncert Solution Class 10th Ch-2 Acid Bases and Salts, ncert solutions class 10 science chapter 2 study rankers, ncert solutions for class 10 science chapter 2 intext questions Leave a comment Solution: If the soil is acidic in nature (PH below 7) then such field should be treated with quick lime (calcium oxide) or slaked lime (calcium hydroxide) or chalk (calcium carbonate). How do metal carbonates and metal hydrogen carbonates react with acids? Test tube ‘A’ Na2CO3 (s) + 2HCl (aq) → 2NaCl (aq) + CO2 (g) + H2O (l) In this chapter, various chemical properties of acids, bases and salts and the reaction of them with metals, non-metals are studied. Choose the correct answer: Question 1. NCERT Solutions for Class 10 Science Chapter 2 Acids, Bases and Salts Intext questions and chapter end exercises question answers are given below updated for new academic session 2020-21. The subject experts at BYJU’S have prepared the NCERT Solutions for Class 10 Science to help students understand the concepts efficiently. New Simplified Chemistry Class 10 ICSE Solutions -A: Acids, Bases and Salts. (i) as an antacid ICSE Solutions Selina ICSE Solutions ML Aggarwal Solutions. CBSE Class 10 Science Notes Chapter 2 Acids Bases and Salts. Amount and concentration taken for both the acids are same. Which one of the following types of medicines is used for treating indigestion? Under what soil condition do you think a farmer would treat the soil of his fields with quick lime (calcium oxide) or slaked lime (calcium hydroxide) or chalk (calcium carbonate)? Reactions occurring in the above activity: On passing the gas evolved through the lime water: But on passing excess CO2 gas through the lime water, milkiness disappears due to the formation of soluble CaHCO3 Class 10 Chemistry Chapter 2 Important Questions with Answers Acids, Bases and Salts. Hence it is safe to add acid to water but not water to acid. Answers and explanation of MCQ tests are given just below each questions. Study Reference for Class 10 Chapter 2 Acids, Bases and Salts (ii) Solution A has more H+ ion concentration because higher the hydronium ion concentration, lower is the pH value. (2013) To prepare well for the board exams, students should choose the perfect reference guide which helps them to grasp the concepts effortlessly. Class 10 Science Acid, Bases and Salts Mind Map Acids. (b) How are sodium hydroxide and Cl2 (Chlorine) gas produced from common salt. The mixture contains more of hydroxide ions than hydrogen ions, so it is basic in nature. (i) A is acidic solution whereas B is basic solution. Answer: While diluting an acid, why is it recommended that the acid should be added to water and not water to the acid? The substance is Copper sulphate crystals (CuSO4.5H2O) which are blue in colour. Also list two uses of Na2CO3.10H2O. This exemplar solution covers questions on the difference between acids, bases and salts, indicators, litmus paper test, neutralisation and daily life explanations. Give two examples of bases. Add about 2 ml of dilute HCl acid to both of these test tubes. You have been provided with three test-tubes contains distilled water and the other two contain an acidic solution and a basic solution, respectively. 3. (i) Identify the acidic and basic solution. Give examples. This solution provides you with answers to the questions provided in the NCERT Class 10 textbooks. Question 9. In-text questions set 2 —> Page number 22. (a) Antibiotic (b) Analgesic (c) Antacid (d) Antiseptic. (i) Oxalic acid (ii) Acetic acid (iii) Tartaric acid 2.15 mL of water and 10 mL of sulphuric acid are to be mixed in a beaker (i) State the method that should be followed with reason. How is the concentration of hydronium (H3O+) ions affected when a solution of an acid is diluted? How do acids and bases react with metals? (ii) Give the basicity of nitric acid, acetic acid and phosphoric acid. In addition, solution B will be basic and A will be acidic. Give two examples Answer: In general acids obtained from minerals or non-living things are called mineral or inorganic acids. (2012, 2014) Explain why an aqueous solution of sodium sulphate is neutral while an aqueous solution of sodium carbonate is basic in nature. 1. It is used to bleach wood pulp in paper factories. Bacteria present in the mouth produce acids by the degradation of sugar and food particles remaining in the mouth after eating. Offline Apps 2020-21 are also in updated format free to download. (ii) alcohol and glucose also contain hydrogen, but do not conduct electricity. Class 10 - Biology Chapter: Life Processes Assertion Reasoning Type Questions From session 2019-20 onwards, CBSE introduces a new... CBSE Class 10/9/8 - English - Reading Comprehension (Unseen Passage) (Set-14)(#eduvictors)(#readingComprehension) (c) Why does bee sting cause pain and irritation? Answer. A solution reacts with crushed egg-shells to give a gas that turns lime-water milky. (2017 OD) (b) This milk takes long time to set into curd because the lactic acid produced here first neutralises the pH then the pH is reduced to turn milk to curd. Which gas is usually liberated when an acid reacts with a metal? (b) Chemical formula of two such compounds whose one formula unit is associated with 10 and 2 water molecules respectively. Answer: When same concentration of HCl and acetic acid are taken then these two produce different amounts of hydrogen ions. NCERT Solutions for Class 10 Science Chapter 2 Acids, Bases and Salts is an accumulation of carefully drafted answers to all the questions asked in chapter 2. If the liquid of test tube B turns that red litmus paper to blue again, it shows that it is a base. Some compounds show acidic character as they dissociate in the aqueous solution which results in the production of hydrogen ions (acids like HCl, HNO3). Use of Sodium hydroxide (NaOH). Give two examples. The resulting solution is neither acidic nor basic. Answer:(i) B (ii) B (iii) Ammonium hydroxide Question 2: (i) What is basicity of an acid. Solution B: pH = 8 Acids Bases and Salts : NCERT Exercise Questions Q.1 A solution turns red litmus blue, its pH is likely to be (a) 1 (b) 4 (c) 5 (d) 10 Oxide with base ), will acids, bases and salts class 10 questions and answers pH is likely to be completely neutralised by 8 mL of a reacts! Covered Important Questions are solved & explained by expert teacher and as per board. 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