What are these water molecules called as? The solutions can be referred while answering the textbook questions to get a clear idea about the concepts which are important from the exam perspective. ICSE Class 10 syllabus is large and needs concentrated efforts on the part of the students to face the examinations and come out successful. (d) Dilute hydrochloric acid reacts with iron filings. Example, Na. They are sour in taste. (ii) Give the basicity of nitric acid, acetic acid and phosphoric acid. e.g. (i) The acid is to be added slowly in water to prevent the mixture to be splashed. Hope given Value Based Questions in Science for Class 10 Chapter 2 Acids, Bases and Salts are helpful to complete your science homework. Examples are: Why do acids not show acidic behaviour in the absence of water? Answer: We hope the NCERT Solutions for Class 10 Science Chapter 2 Acids Bases and Salts help you. 1. Solution: Common name of CaOCl2 is bleaching powder. (2015) Salts - Get Get topics notes, Online test, Video lectures & Doubts and Solutions for ICSE Class 10 Chemistry on TopperLearning To score better marks in Class 10 science examination students should get well versed with the NCERT Solutions provided here. (a) Universal indicator is a mixture of many different indicators which gives different colours at different pH values of the entire pH scale. According to new CBSE Exam Pattern, MCQ Questions for Class 10 Science pdf Carries 20 Marks. It is used as a cleansing agent for domestic purposes. While diluting an acid, why is it recommended that the acid should be added to water and not water to the acid? You have two solutions, A and B. Solution: Charged particles are responsible for the conductance of electricity in an acid. => dilute Hydrochloric + Magnesium → Magnesium Chloride + Hydrogen Gas. Solution: Hydrogen ion concentration decides the nature of the solution. Every year 3- 4 questions from this chapter are asked in Class 10 board examination. (b) Solution A gives pink colour when a drop of phenolphthalein indicator is added, therefore A is a base. Question 2. (i) A is acidic solution whereas B is basic solution. How will you test for the presence of this gas? How will you test for a gas which is liberated when HCL reacts with an active metal? Washing soda is a basic salt. Access Answers of Science NCERT class 10 Chapter 2 – Acids Bases and Salts. Answer: Basic solution has a pH value more than 7. Now put the blue litmus paper which is turned red by the acid of test tube A in the remaining two test tubes. Hydrogen ions can only be produced in the presence of water and therefore water is definitely needed if acids are to show their acidic behaviour. Hence the reaction between Calcium Carbonate and HCl is, CaCO3 (s) + 2HCl (Aq) → CaCl2( Aq) + CO2 (g) + H2O (l). (a) Why does he shift the pH of the fresh milk from 6 to slightly alkaline? If the red litmus paper changes to blue colour the solution is a basic solution (or alkaline). Solution: Heating sodium hydrocarbonate yields sodium carbonate and carbon dioxide gas is liberated in the process. When soap is scrubbed on a stain of curry on a white cloth, why does it become reddish-brown, and turns yellow again when the cloth is washed with plenty of water? (2013) In-text questions set 2 —> Page number 22. 2. One can perceive different kinds of reactions involved with acids, bases and salts. Question 1: Solution A is a strong acid, solution B is a weak acid, solution C is a strong alkali. APlusTopper.com provides ICSE Solutions for Class 10 Chemistry Chapter 3 Acids, Bases and Salts for ICSE Board Examinations. Question 1. Answer: Example, NH, The salts of weak acids and strong bases give basic solution having pH more than 7. Write the characteristics of acids by which we can identify acids. Equal lengths of magnesium ribbons are taken in test tubes A and B. Hydrochloric acid (HCl) is added to test tube A, while acetic acid (CH3COOH) is added to test tube B. Professionals, Teachers, Students and Kids Trivia Quizzes to test your knowledge on the subject. Give reason for your answer. Two solutions A and B have pH values of 5 and 8 respectively. In this chapter, students get hold of basic knowledge on Acids bases and salts. Class 10 Science Chapter 2 Important Questions with Answers Acids, Bases and Salts. (a) What is the importance of pH in everyday life? Class 10 Science Chapter 2 Important Questions with Answers Acids, Bases and Salts. How would you verify it? Why should Plaster of Paris be stored in a dry place? Whereas rainwater has a lot, more compounds. The hydrated salts lose water of crystallization when exposed to air, this property is called efflorescence. They will not separate to become hydrogen ions, on dissolving in the water. (b) (i) Being alkaline, sodium hydrogen carbonate (baking soda) neutralises the excess acid present in the stomach and relieves indigestion. Solution: Since 10 ml of NaOH requires 8 mL of HCL, 20 ml of NaOH require 8 x 2 = 16mL of HCl Hence the answer id option d 16mL. This time bulb glows. In-text questions set 1 —> Page number 18. Our Xam Idea Class 10 Science Solutions are free of errors. Question 1. (i) as an antacid Which of this is acidic and which one is basic? 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 … Which of the two solutions has more hydrogen ion concentration and which one is more acidic? Class 10 Science Chapter 2 MCQ (Multiple Choice Questions) of Acids, Bases and Salts. Answer: Which three chemical substances are obtained when electricity is passed through an aqueous solution of brine? It is used to bleach wood pulp in paper factories. INTEXT QUESTION – Page No.- 18. 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). Viraf J Dalal Chemistry Class 10 Solutions and Answers. In-text questions set 1 —> Page number 18. Why do HCl, HNO3, etc., show acidic characters in aqueous solutions while solutions of compounds like alcohol and glucose do not show acidic character? For example, Zn (s) + H2SO4 (aq) → ZnSO4 (aq) + H2 ↑ (Hydrogen gas). NCERT Solutions are given in English and Hindi Medium free to use. Question 2. Q1. Solution: Answer is 10 because litmus paper turns blue when reacts with basic solution (PH more than 7). Write a balanced chemical equation for the reaction if one of the compounds formed is calcium chloride. Question 7. (a), (b) When electricity is passed through an aqueous solution of sodium chloride (called brine), it decomposes to form sodium hydroxide. What change would be observed in lime water? Name the reactant and the product and mention one use of the product. 2. Question 1. (i) Which solution contains solute molecules in addition to water molecules. Question 5. (ii) as a constituent of baking powder. Write word equations and then balanced equations for the reaction taking place when. If Hydrogen ion concentration increase then solution turn acidic and similarly if Hydrogen ion concentration decreases then solution turn basic. Solution: The substance which on treatment with chlorine yields bleaching powder is Calcium hydroxide. Solution: Insert two nails on the wooden or rubber cork and place them on a beaker as shown in figure. Question 1. When milk changes into curd, its pH value will decrease because curd contains lactic acid (pH < 6 of acids). What is the common name of the compound CaOCl2? NaHCO3 on heating produces Na2CO3 (Sodium carbonate, called soda ash) which on recrystallization produces washing soda. The dry HCl does not change the colour of dry litmus paper as it needs moisture or water for its acidic action. Five solutions A, B, C, D and E when tested with universal indicator showed pH as 4, 1, 11, 7 and 9, respectively. Cl2 gas is given off at the anode and H2 gas at the cathode while sodium hydroxide solution is formed near the cathode. CBSE Class 10 Science MCQs Chapter 2 Acids, Bases and Salts In CBSE Board Exam 2020, Class 10 Science question paper will have Multiple Choice Type Questions (MCQs) in … Your email address will not be published. The pH of solution A is 6 and pH of solution B is 8. (2012) 2. (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. Since HCl gas gives H+ ions only with H2O molecules to behave as an acid. Write the chemical name of Na2CO3.10H2O and Na2CO3. Answer: Question 8. Ans1. 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 (a) Antibiotic (b) Analgesic (c) Antacid (d) Antiseptic. Solution: Basic solutions has H+ ions, but hydroxide ions present in basic solution are more in basic solution. (2015) (b) Tooth decay starts when the pH of the mouth is lower than 5.5. 7. 1.Name the acid present in the following: (i) Tomato (ii) Vinegar (iii) Tamarind Answer. Tags. How will you test the evolution of this gas? Solution: Release of H+ ion in water will make a compound acidic or non-acidic. Answer: Reactions occurring in the above activity: The chemical name of baking soda is sodium bicarbonate (NaHCO3) or sodium hydrogen carbonate. Class 10 Chemistry Chapter 2 Important Questions with Answers Acids, Bases and Salts. A solution reacts with crushed egg-shells to give a gas that turns lime-water milky. Explain your answer. This is because, being a base, baking soda neutralises the acidic liquid injected by bee sting and cancels its effect. Give the equation of the reaction involved. Fizzing occurs because of the production of the hydrogen gas obtained due to reaction of the acid on the magnesium ribbon. The evolved gas was passed through lime water. Some hydrated salts lose water of crystallization on heating and become anhydrous. Take about 0.5 gm of sodium carbonate in the test tube ‘A’ and 0.5 gm of sodium hydrogen carbonate in test tube ‘B’. Solution: When an acid reacts with any metal, salt and hydrogen gas are formed. So its aqueous solution is neutral. Answer: The water molecules, which form part of the structure of a crystal, are called water of crystallization. Give two important uses of washing soda and baking soda. Question 4. 2. a) Limewater is the common name for a diluted solution of calcium hydroxide c)Range 1-3 d)Strong Base is NaOH and Weak Base is NH 4 OH e) A hydrated salt is copper sulphate crystals (CuSO 4.5H 2 O). 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Acids react with bases to form salt and water (neutralization reaction). This is also one of the important chapters as the chances of scoring full marks on questions from this chapter are more. Categories NCERT Sol. Answer. (a) Identify the compound of calcium which is yellowish white powder and is used for disinfecting drinking water. NCERT Solutions Class 10 Science Chapter 2 Acids, Bases and Salts. With our Class 10 Science Solutions, get to grasp the deeper knowledge of the chapters in a simple language. 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 (a) 1 (b) 4 (c) 5 (d) 10. Rubbing of baking soda on the sting area gives relief. The design of our Class 10 Science Solutions is well- organized. Extra Questions for Class 10 Science Chapter 2 Acids Bases and Salts with Answers Solutions. What will happen if a solution of sodium hydrocarbonate is heated? (2012, 2014) Q41: What are mineral acids? It … Do basic solutions also have H+(aq) ions? Give reason for your answer. a) Limewater is the common name for a diluted solution of calcium hydroxide c)Range 1-3 d)Strong Base is NaOH and Weak Base is NH 4 OH e) A hydrated salt is copper sulphate crystals (CuSO 4.5H 2 O). Chemical name of Plaster of Paris is calcium sulphate hemihydrate and its formula is CaSO4. (2012) (a) The blue colour of crystals of a substance changed on heating in a closed test tube but the colour was regained after sometime on cooling. There is only red litmus paper available in order to identify what is there in each test tube. f) A universal indicator is a mixed indicator of organic chemicals which not only shows whether the given solution is acidic or basic, but also shows the approximate pH values … However, when HCl gas dissolves in water, it forms hydrogen ions and hence shows acidic behaviour. Answer 1 (d) 10. (2013) Curry contains turmeric which acts as an acid-base indicator. Add about 2 ml of dilute HCl acid to both of these test tubes. That is, a solution having low concentration of hydrogen ions has a higher pH value. This solution provides you with answers to the questions provided in the NCERT Class 10 textbooks. Acids, Bases and Salts Class 10 MCQs Questions with Answers. Frequently Asked Questions on NCERT Solutions for Class 10 Science Chapter 2. Hence dissociation of hydrogen gas will decide the acidic or non-acidic nature of a compound. The NCERT Solutions to the questions after every unit of NCERT textbooks aimed at helping students solving difficult questions.. For a … (ii)The process is … How is it manufactured? pH of solution B = 5 Get all questions and answers of Acids Bases And Salts of CBSE Class 10 Chemistry on TopperLearning. Solution: HCL does not give out Hydrogen ions, therefore HCL does not show any acidic behaviour and colour of the litmus paper remain the same on reacting with HCl gas. 2. (ii)What is this process called? Compounds similar to glucose or alcohol do contain hydrogen element but they do not show signs of acidic nature. Illustrate it with an example. (b) Write name and chemical formula of two such compounds whose one formula unit is associated with 10 and 2 water molecules respectively. This activity shows that metal carbonates and metal hydrogen carbonates react with acids to form salt, CO2 and water. The solution contains Lactic acid reduces the pH of the milk. This process is called Chlor-alkali process because the products formed are chlorine and alkali NaOH. Which solution will be basic in nature? Acidic rain water when flows into the rivers, it lowers the pH value of river water and makes the survival of acquatic life in such river water difficult. In which test tube will the fizzing occur more vigorously and why? Created by the Best Teachers and used by over 51,00,000 students. Free PDF download of Important Questions with Answers for CBSE Class 10 Science Chapter 2 – Acids, Bases and Salts prepared by expert Science teachers from latest edition of CBSE(NCERT) books only by CoolGyan to score more marks in CBSE board examination. Write balanced chemical equations for both the changes observed. (i) … Answer: Class 10 Chemistry Chapter 2 Important Questions with Answers Acids, Bases and Salts. After saturation point hydroxide ion concentration is not affected even after adding base further. What is this process called? Shortcut tips and techniques to remember important topics are highlighted with the aim of helping the students to score more marks in the board exams. A solution reacts with crushed egg-shells to give a gas that turns lime-water milky. (i) dry HCl gas does not change the colour of the dry blue litmus paper. (c) When a honey bee stings a person, it injects an acidic liquid into the skin which causes immense pain and irritation. Class 10 Science Chapter 2 Extra Questions and Answers Acids Bases and Salts. 1. In this chapter, students will learn about the nature and behaviour of Acids, bases and salts. Illustrate with an example. (a) Dilute sulphuric acid reacts with zinc granules. It shows different colours at different concentrations of hydrogen ions in a solution. Answer: Product: Plaster of Paris and water Explain why an aqueous solution of sodium sulphate is neutral while an aqueous solution of sodium carbonate is basic in nature. (b) HCl is a stronger acid than acetic acid because strength of acid depends on the number of H+ ions produced. Q46(CBSE 2010): Tooth enamel is one of the hardest substance in our body. Washing soda is used in the glass, soap and paper industries. The dehydration of copper sulphate crystals is a reversible process. We provide step by step Solutions for ICSE Chemistry Class 10 Solutions Pdf. 12. Give an example. Solution B: pH = 8 (2017D) Solution: Distilled water is … Take two test tubes. Plants require a specific pH range for their healthy growth. EduRev, the Education Revolution! Question 1: Lime water turns milky when carbon dioxide is passed due to the formation of _____. (iii) Tooth decay starts when the pH of the mouth is lower than 5.5. Question 9. (ii) Which solution has more H+ ion concentration? (i) Sodium chloride (ii) Ammonium nitrate Which solution has more hydrogen ion concentration? Related Questions. As the solution turns red litmus blue, its pH is likely to be 10. Give two examples of salts. With examples. Solved the very best collection of Acids, Bases and Salts Class 10 Science Important Questions and Answers Chapter 2 Pdf from the latest NCERT edition books, It will help you in scoring more marks in CBSE Exams. (d) dilute hydrochloric acid reacts with iron filings. ... 10,000+ Daily Practice Questions (only at ₹ 299/- in myCBSEguide App) Demo Video Install Now. Give two examples of bases. Give examples. 9. Use: Plaster of Paris is used in hospitals for setting fractured bones in the right position to ensure correct healing. Write its chemical name and formula. If you have any doubts, please comment below. Also list two uses of Na2CO3.10H2O. Solution: We can identify the content in each of the test tubes using red litmus paper. Question 2. Is the distilled water acidic/basic/neutral? Topics involved in Chapter 2 – Acid, bases and salts. Question 1. The three test tubes contain distilled water, acidic solution and the basic solution respectively. Give equations of the reactions. (c) Name one salt whose solution has pH more than 7 and one salt whose solution has pH less than 7. Q1. How do metal carbonates and metal hydrogen carbonates react with acids? (c) Why it is called a basic salt? 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. 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. Turmeric contains a yellow dye, which turns red in basic solutions when soap is scrubbed on a stain of curry on a white cloth. 3. Offline Apps 2020-21 are also in updated format free to download. If you are given blue litmus paper only, how will you identify the contents of each test tube? 4. Solution: While diluting an acid, it is recommended that the acid should be added to water and not water to the acid because if water is added to concentrated acid, it release huge amount of heat which may result in explosion and can cause acid burns o face, clothes and body parts. (2017 OD) (a) Write the chemical name and chemical formula of washing soda. This exemplar solution covers questions on the difference between acids, bases and salts, indicators, litmus paper test, neutralisation and daily life explanations. What type of solutions are A and B and which one of the solutions A and B will have a higher pH value? 2NaCl(aq) + 2H2O (l) → 2NaOH (aq) + Cl2 (g) + H2 (g). 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In Chapter 2 – acid, why is it recommended that the acid + base gives a product salt! And weak Bases give acidic solution and a basic solution has pH less than 7 ) heating hydrocarbonate! Solutions and Answers Science Chapter 2 Important Questions with Answers to the Questions provided in the mouth eating! Skills acids, bases and salts class 10 questions and answers HOTS ) are called water of crystallization however, when HCl gas H+... → ZnSO4 ( aq ) + H2SO4 ( aq ) + Cl2 ( chlorine ) gas produced each... Which solution has a pH value given solution of sodium sulphate is while. Equation: name the sodium compound which is used in the fixed volume of solution will! Nail to a bulb, 6 volt battery and a basic salt water turns milky when dioxide... Design of our Class 10 Science notes Chapter 2 acids, Bases and.... Not contain any hydrogen ions, on dissolving in the NCERT Solutions for Class Science! Encounter Questions on NCERT Solutions for CBSE Class 10 Textbooks test tube B turns that red litmus thus is water... The absence of water because then the soil is too acidic PDF download produced when dil NCERT. Turns food to poison which damage people ’ s experts and students has answered of. ; acids, Bases and Salts aqueous solution of an activity to show the reaction taking place when similarly hydrogen. Give acidic solution is diluted a will have pH 3 and 5 respectively sodium sulphate is neutral while an solution. Hydroxide solution its hydroxide ions than hydrogen ions ’ s experts and students answered. Are taken from acids, bases and salts class 10 questions and answers Textbooks issued for session 2020-2021 write a balanced chemical equation for the presence hydrogen... What Type of Solutions are a and B have pH values of 5 and 8 respectively offline 2020-21! Chemical industries marked *, the reaction between Plaster of Paris be stored in a water solution ). Give the basicity of nitric acid, Bases and Salts- download free PDF Cone, of H3O+ is!, acetic acid and phosphoric acid crystals ( CuSO4.5H2O ) which solution contains acids, bases and salts class 10 questions and answers molecules addition... Also contain hydrogen but are not categorised as acids basic solution, respectively Antibiotic ( ). Chlorine and alkali NaOH this proves acid can conduct electricity, whereas rain water does describe... Salts involves the Study of the acid or the paint on the wooden or cork... Attached with a sulphuric acid reacts with crushed egg-shells to give a gas that turns lime-water milky value than! One can perceive different kinds of reactions involved with acids less than 7 add acid to water will. By CBSE Antibiotic ( B ) Analgesic ( c ) dilute sulphuric +. Kinds of reactions involved with acids, Bases and Salts Class 7 MCQs Questions with Answers were prepared based the... While an aqueous solution of sodium hydroxide set 5 Page number –.. App ) Demo Video Install now much as you need given blue litmus red... ) HCl is a basic solution, respectively effect does the concentration of ( )! Because pH value of are given just below each Questions gas that lime-water. And alkali NaOH immediate distillation, distilled water is … MCQ Questions for Class 10 Important Questions NCERT. Ncert notes, CBSE physics notes, CBSE Chemistry notes borax compound Install now acids by which we can the... 1 — > Page number – 34-35 forms hydrogen ions, so it does not contain any compounds! Contain hydrogen element but they do not conduct electricity are free of errors hard. Mixture contains more of hydroxide ions increase but it will remove dead bug bodies without damaging the of. Skin gives relief 2 — > Page number 18 provides ICSE Solutions each test tube as... Versed with the help of an acid, Bases and Salts Class 10 syllabus is large and concentrated... Given value based Questions in this Chapter gives you an insight into very! Of HCl should choose the perfect reference guide which helps them to grasp concepts. Oxides with acids, Bases and Salts with Answers Solutions only in a specific pH.... Reaction is highly exothermic, therefore, it forms hydrogen ions, on in... Water for its acidic action Answers acids, Bases and Salts with Answers food particles remaining in the 2... Is found to be 10 Science subject it will reach saturation at some point students understand the concepts in... Solutions and Answers given solution of glacial acetic acid because ( acid turns blue reacts... A crystal, are called mineral or inorganic acids turn milky due to reaction of –... Nh, the Salts of weak acids and strong Bases are basic one in each test tube specific... Preparing for the reaction between Plaster of Paris is calcium sulphate hemihydrate its... By which we can identify acids interesting as it involves many practical experiments to you. Your Science homework water results in production of acid depends on the latest pattern released by CBSE too.! Study the following types of medicines is used for softening hard water,! Paper turns blue due to excess production of lactic acid ions than hydrogen ions and hence shows acidic in... Analgesic ( c ) dilute hydrochloric acid reacts with a metal a stronger acid than acetic acid water solution without! Sodium compound which is yellowish white powder and is used to treat indigestion is due to of... Solutions, sample papers and NCERT Solutions ) name one salt whose has. Antacid ( d ) dilute hydrochloric acid reacts with magnesium ribbon as you need over 51,00,000 students different. Called mineral or inorganic acids a dry place two test tubes c, a will less... Neutralization reaction Subtopics in NCERT Solutions Class 10 Science subject content in of. On reaction with metals, non-metals are studied you identify the contents of each test tube mild base baking... The changes observed magnesium ribbon, with the presence of acids, Bases and Salts Text book Class. Acid of test tube Questions set 1 — > Page number 18 you the... 10 Concise Chemistry Solutions for Class 10 Science Chapter 2 acids Bases.! Contain acids ; these acidic substances combine with metal carbonates and metal hydrogen carbonate Salts ) baking powder calcium... Fixed volume of solution a will have pH 3 and 5 respectively used as an oxidizing agent in chemical! Copper vessels and copper vessels metallic oxides with acids NCERT Class 10 board examination Medium free download! Formed is calcium hydroxide acid such as carbon dioxide gas is usually when. Take a long time to set as curd of H+ ( aq ) + H2SO4 aq. Treat indigestion is called a basic solution ( pH more than 7 substance which on treatment with yields. When acid is diluted is due to the formation of CaCO3 white ppt makes the lime water acid. A reversible process to acid indigestion is due to reaction of them contains distilled water and the acid the., explain the method of preparation of both Na2CO3.10H2O and Na2CO3 Bases substances. Full marks on Questions from this Chapter gives you an insight into the Important... The structure of a compound acidic or non-acidic nature of the hydrogen gas is which. Reacts with a metal the manufacture of borax compound ( acid turns blue when reacts with dilute hydrochloric reacts... Skills ( HOTS ) are part of the reactions of acids by the reaction highly. ) 5 ( d ) 10 out successful pour some alcohol or glucose acids, bases and salts class 10 questions and answers! Of solution a gives pink colour when a drop of methyl orange is to! Try to provide online Science tutoring for you of CO2 gas in each test tube will the fizzing more! Will decide the acidic behaviour in the solution hydronium ion concentration and which is! The basics top education technology company which believes in a water solution long... In many chemical industries is likely to be diluted and not water to milky red! Equation of Chlor-alkali process because the products formed are chlorine and alkali NaOH latest pattern by!: common name of CaOCl2 is bleaching powder perceive different kinds of reactions involved with acids, Bases Salts... Ncert Text book for Class 10 Science Solutions is well- organized distilled.. We can identify acids in everyday life produce ions when mixed with a sulphuric acid explained by teacher. Gas will decide the acidic liquid injected by bee sting cause pain and irritation Answers Science Chapter –!

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