CBSE Class 10 Science Book Chapter 2 “Acids, Bases and Salts” Multiple Choice Questions ‌(MCQs) with Answers. (i) Sodium carbonate is obtained from baking soda and is used to remove hardness of water. 22. (c) Why does bee sting cause pain and irritation? 15. Question from very important topics are covered by NCERT Exemplar Class 10.You also get idea about the type of questions and method to answer in your Class 10th … Solution-E (Strongly basic). Answer: Write chemical equation of the reaction involved and state two uses of the product obtained. Only a narrow range of pH change can be sustained by a living organism, any further change in pH can make the living difficult. Answer. (b) H2SO4 and HNO3    are strong acids. A white powder is added while baking breads and cakes to make them soft and fluffy. Answer. Answer. Required fields are marked *, Concise Mathematics Class 10 ICSE Solutions 2018, Practical Based Questions for Class 10 Science Chemistry. H2 gas is liberated. Master this topic as you play. Question 1. We try to provide online math tutoring for you. Soluble bases are called alkalies, e.g. Explain ho… On adding water to anhydrous copper sulphate, it changes into blue again. ... 19 Questions Show answers. (iv) For a dilution of acid, acid is added into water and not water into acid. in a solution have on the pH of solution? (ii) It is used to make casts and moulds. A suspension of Y in water is applied to the walls of a house during white washing. It starts corroding due to acid formed in mouth. Important Question for Class 10 Science Metals and Non-Metals PDF will help you in scoring more marks.. (CBSE 2017) Which of the following would change the colour of this pH paper to greenish-blue? (b) (i) Name one antacid. Free PDF download of Important Questions with solutions for CBSE Class 10 Science Chapter 2 - Acids, Bases and Salts prepared by expert Science teachers from latest edition of CBSE(NCERT) books. 7.State reason for the following statements: K a = = = 10-5. 3. It turns lime water milky when bubbled in small amount. Answer. 49.Which gas is evolved when sodium hydrogencarbonate reacts with dilute hydrochloric acid? Question 7. Pale green is the colour of FeSO4.7H2O crystals. This solution provides you with answers to the questions provided in the NCERT Class 10 textbooks. Conclusion: Crystalline substances have water of crystallisation which are lost on heating. Hyperacidity is caused by excess of hydrochloric acid in stomach. (i) X is sodium hydroxide, NaOH. Litmus paper, test tube, test tube, lime water. (iii)Lactic acid. Write the relevant equations of all the reactions that take place. (a) What is an alkali? It is used to determine the strength of aci d/base. (a) Alkali, e.g. Conclusion : Crystalline substances have water of crystallization which are lost on heating. 39.What is Plaster of Paris chemically? It is a neutral salt and is not expected to bring any change in the pH of distilled water. Online Practice. ‘ Take five test tubes and label them as A, B, C, D and E. Add 5 mL of five unknown solutions in them. Strong acids are those acids which are completely ionised in aqueous solution. Unlimited adaptive online practice on this topic. But it evolves hydrogen gas on reacting with sodium metal 20. Answer: The increasing order of H-ion concentration :C 2C2H5ONa + H2. Observation:Water vapours get condensed in a test tube and colour Strong acid: HCl,  HNO3,H2SO4 Weak acid: Citric acid, acetic acid, formic acid. (i) Which solution contains solute molecules in addition to water molecules. Why does the farmer treat the soil with quicklime? (a) Write the name given to bases that are highly soluble in water. (ii)It liberates CO2 with H2SO4, which extinguish fire. It neutralizes excess of acid and gives relief from pain caused by hyperacidity. a. Answer. Save. NCERT Exemplar Class 10 Science is very important resource for students preparing for X Board Examination. The evolved gas was then passed through lime water. C. 10. 10th - 12th grade. CBSE Class 10 - Science - Paragraph Based Questions (New Pattern 2019-2020) (#class10Science)(#eduvictors) CBSE Class 10 - Science - Paragraph Based Questions (New Pattern - 2019-2020) In 2019-20 curriculum, CBSE has introduced new patterns of questions that will be asked in secondary examination. Answer. (d) Toothpastes are basic in nature. What will be the expected change in colour of the pH paper ? Answer. Answer. State the colour change you are likly to observe on mixing the two solutions. (a) Define olfactory indicators. • Connect the nails to the two terminals of a 6 volt battery as shown in figure. Online Test. This consists of 1 mark Questions, 3 Mark Numericals Questions, 5 Marks Numerical Questions and previous year questions from Acids Bases and Salts. How is it manufactured? It becomes dirty white on heating. Crystals will first become dirty white and then change to brown. Answer. (CBSE 2017) What are strong and weak acids? Answer. It will burn with ‘pop’ sound. Aim: To show crystalline salts contain water of crystallization. (c) A milkman adds a very small amount of baking soda to fresh milk. (a) Identify the most acidic and most basic solutions. (a) Blue vitriol. Answer. 6.Pass the gas evolved through lime water and note down your observations. Name the gas and describe a test to confirm the identity of the gas. 51.Name the gas usually liberated when a dilute acid reacts with a metal. (i) Oxalic acid (ii) Acetic acid (iii) Tartaric acid. (a)CuSO4.5H2O is hydrated copper sulphate. of blue crystals changes into white. H2SO4 to produce effervescence, The gas evolved extinguishes a burning candle. 55.What is the colour of litmus in a solution of ammonium hydroxide? Partial oxidation: Upon oxidation with chromic anhydride (CrO3) dissolved in acetic acid (CH3COOH), ethanol forms ethanal, also called acetaldehyde. pH is a numeric scale in chemistry that is used to determine whether the substance is acidic, basic or neutral in nature. Antacid is basic in nature. Write the chemical equation for the evolution of this gas and its effect on burning splinter. In this experiment, we will learn how to find the pH of acids and bases. Question 15. 3. (b) Arrange the above four solutions in the increasing order of H+ ion concentration. Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 11.. (a) Acetic acid will remain colourless in phenolphthalein. (b) When water is added to the white solid X, product Y formed is calcium hydroxide. The one which gives a brisk effervescence contains acetic acid while the other in which no effervescence is noticed contains ethyl alcohol. (a) The white solid X is quick lime. (a) The compound is bleaching powder (CaOCl2). give relief from acidity. (CBSE 2014) Question 1. Choose strong acid and strong base from the following: CH 3 COOH, NH 4 OH, KOH, HCI Answer: Strong acid—HCI, Strong base—KOH. Hydrochloric acid, citric acid, acetic acid, nitric acid, formic acid, sulphuric acid. (b) pH will decrease as it turns to curd because curd is acidic due to the presence of lactic acid. How? A metal A’ gives a compound ‘B’ (molecular mass 40) when it reacts with water. Answer: 41. Answer.The water molecules associated with a crystalline substance is called ‘water of crystallisation’. Write the name of one such antacid. Solution-C (Strongly acidic); (a) Five solutions A, B, C, D and E when tested with universal indicator showed pW as 4, 1, 11,7 and 9 respectively. Justify the statement. MCQ Questions for Class 10 Science with Answers were prepared based on the latest exam pattern. Printable worksheets with 10 questions in PDF format. (ii) Which solution could be a solution of glacial acetic acid ? (a) Those substances whose smell (odour) changes in acidic or basic solution are called olfactory indicators, e.g. 2.Set the apparatus as shown in diagram. Write the chemical reaction taking place when the powder is heated during baking. The tube which turns blue litmus red contains acetic acid while the other which does not change its colour is that of ethyl alcohol. The compound is also formed by chlor-alkali process. Answer. (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. Question 13. MCQ Questions for Class 10 Science: Ch 2 Acids, Bases and Salts. However, when a dry piece of sodium pellet is added to the liquid, a gas is evolved with brisk effervescence. (ii)Tomatoes and Guava. We have Provided Acids, Bases and Salts Class 10 Science MCQs Questions with Answers to help students understand the concept very well. Material Required: CaCO3(marble chips), Woulfe-bottle, thistle funnel, dil. (i) Tap water contains ions which conduct electricity, distilled water does not contain ions. 12. It burns with pop sound when burning candle is brought near the gas. (c) Name the gas liberated in both the tubes. Practising given Class 11 Chemistry Chapter wise Important Questions with solutions will help in scoring more marks in your Examinations. Answer. Classify the following salts into acidic, basic and neutral: Potassium sulphate, ammonium chloride, sodium carbonate, sodium chloride. CH3COOH + NaHCO3 ———–> CH3COONa + H2O + CO2 31, What is the colour of FeSO4.7H2O crystals? 7 months ago. (ii)Oxalic acid. (iii) Mention one important use of this compound. (i) It is used as bleaching agent in paper and textile industries. Answer. Also write chemical equation for the reaction. (ii)What is this process called? (a) Name the particles present in: (i) Strong electrolyte. The gas evolved is CO2 A student added sodium hydrogen carbonate solution in ethenoic acid taken in a test tube and the gas evolved was tested with a burning splinter. (ii)The process is called dilution. Answer. (b) When this white powder is mixed with water a hard solid mass is obtained. 10.Name the natural source of each of the following acid show acidic characters in aqueous solutions while solutions of compounds like alcohol and glucose do not show acidic character? Question 12. Bring a burning splinter near the gas. Given below are the Class 10 Science Solved Numerical Questions for electricity a. Concepts questions b. Calculation/Numerical problems c. Multiple choice questions d. Long answer questions e. Fill in the blanks Question 1 A wire of length 3 m and area of cross-section 1.7 × 10-6 m 2 has a resistance 3 × 10-2 ohm. 3. Name the acid and base from which the following salts have been formed : Question 4. MCQ Questions for Class 10 Science: Ch 2 Acids, Bases and Salts. (iii) Weak electrolyte. (i) Tomato (ii) Vinegar (iii) Tamarind Practice that feels like play! RD Sharma Solutions , RS Aggarwal Solutions and NCERT Solutions, July 27, 2018 by Prasanna Leave a Comment. (ii) as a soda acid fire extiguisher 52.What effect does an increase in concentration of H+(aq.) The taste will be slightly sour as it is weakly acidic. The reaction mixture in the saponification reaction is of alkaline nature since it contains in it a caustic alkali. Having proper knowledge of the theories, sufficient practice of the reactions, equations and formulas, and solving questions from the NCERT Chemistry books are very important if you want to score well in Science for Class 10 … (b) Name the compound whose one formula unit is associated with 10 water molecules. Online Test. Acids Bases and Salts Class 10, Summary, Explanation and Notes of Acids Bases and Salts Science Chapter 2 . Predict the nature of the solution. Question 14. 4.Observe vapours being condensed in test tube. (ii) Ca(OH) 2  (aq) + CO2   (g)—> Ca CO3  (s) + HaO(l). 44.Which bases are called alkalies? (CBSE 2015) (ii)It is because process is highly exothermic. (b) HCl, HNO3ionise in aqueous solution, whereas alcohol and glucose do not show acidic characters because they do not ionise in aqueous solution. (iii) Give an example of a solution which is a weak alkali. (b) What could be the product Y ? (i) Identify the compound. (iii) When an acid reacts with a metal oxide. Answer. The nature can be tested by adding a few drops of red litmus to the mixture. 4.Collect the gas in gas jar by upward displacement of air. Toothpaste and tooth powder are basic and neutralise acid formed in mouth which prevents tooth decay. Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 10.. (c) A universal indicator will impart orange colour to acetic acid. 32. State the chemical name of Plaster of Paris. (b) Acetic acid will mix with distilled water to form a clear solution. Hold it with a clamp and heat the tube over a burner. (a) Identify the test tube showing vigorous reaction. Write its chemical name and formula. 54.Which gas is generally liberated when a dilute solution of hydrochloric acid reacts with an active metal? Answer: 78% average accuracy. Its formula is NaCl (Sodium chloride). Register online for Science tuition on Vedantu.com to score more marks in CBSE board examination. Put a small strip of universal indicator in each of them. (i) The acid is to be added slowly in water to prevent the mixture to be splashed. How does it help tq relieve indigestion in stomach? While studying the double displacement reaction, the solutions of barium chloride and sodium sulphate are mixed together. (b) How is washing soda is obtained from baking soda? The available data suggests that the metal A sodium (Na). Give equations of related reactions. Hope given Practical Based Questions for Class 10 Science Chemistry helpful to you. Ans. Explain. (a) HCl is acid and NaOH is base whose combination forms the common salt. It can be used as test for CO2 .The chemical reactions taking place are as follows: Answer. In the following list of acids, separate strong acids from weak acids. 5.Cool the crystals and add few drops of water into it. Now, add a strip of soap in each. It is made up of calcium phosphate. Answer: What is the pH value of pure water? When water is added gradually to a white solid X, a hissing sound is heard and a lot of heat is produced forming the product Y. 21. It will provide practice problems and examples and ask questions about the acidity of solutions. All the MCQs are taken from NCERT Textbooks issued for session 2020-2021. For e.g Acidic substances such as vinegar, tamarind, lemon, etc. Name its main ingredients. It burns with ‘pop’ sound showing that it is hydrogen. 48.What would be the colour of red litmus in a solution of sodium carbonate? When the gas is bubbled through lime water, it becomes milky. Solution A — Orange; 14. It can be prevented by brushing teeth after every meal. 23. Question 3. Give equations of the reactions. Question 1: Solution A is a strong acid, solution B is a weak acid, solution C is a strong alkali. Take a small amount of the given sample in the test tube. State the condition when it starts corroding. (b) Baking … 2.15 mL of water and 10 mL of sulphuric acid are to be mixed in a beaker NCERT Solutions For Class 10 Science Chapter 2 Acids And Bases: In this article, we will provide you with NCERT Solutions For Class 10 Science Chapter 2 Acids And Bases. It is called sodium carbonate decahydrate or washing soda. (d) A brisk effervescence will be noticed due to the evolution of CO2 gas. Name the type of reaction occurs when X is treated with dilute hydrochloric acid. Take 2g of CuS04.5H20 in a boiling tube fitted in a clamp stand. Question 11. (ii) The soil is acidic in nature. (v) Ammonia is a base but does not contain hydroxyl group. (c) What happens when electricity is passed through brine? Answer: The Importance of pH. Two drinks P and Q gave acidic and alkaline reactions respectively. Which of the following would change the colour of this pH paper to greenish-blue? 37.What is a neutralisation reaction? Free PDF download of Important Questions for CBSE Class 11 Chemistry prepared by expert Chemistry teachers from the latest edition of CBSE (NCERT) books. 35.A gas ‘X’ reacts with lime water and forms a compound ‘Y’ which is used as a bleaching agent in chemical industry. Question 25. (ii)It is due to carbon dioxide. Answer. It is used as an antacid. Register online for Science tuition on Vedantu.com to score more marks in CBSE board examination. Sodium hydrogencarbonate (baking soda) on heating gives sodium carbonate which on recrystallisation gives washing soda. Answer: What is the nature of soil? Answer: Answer: 10H2O  . (b) You are given three solutions A, B and C with pH values 2, 10 and 13 respectively. If water is added to acid, bottle of acid will break. Answer: Predict the nature of the solutions in these from the pH character. (i) Name the compound which is obtained from baking soda and is used to remove permanent hardness of water. Which of the following values would represent the pH of a strong base? (c) universal indicator Answer. Question 2. Blue vitriol White Write the chemical equation for the reaction involved. Write its chemical formula. 10H2O. (b) Fresh milk has a pH of 6. Answer. Weak acids are those which do not ionise completely in aqueous solution. (CBSE 2015) Internal Assessment will give you the opportunity to score the remaining 20 marks. On adding water to anhydrous copper sulphate it changes into blue again. 50.Curd is not kept in copper and brass utensils. (a) Our stomach has pH equal to 2. Without the help of any chemical, how will you identify the nature of the sample. Answer. Answer. (i) Give the constituents of baking powder pH is all around us. Fitted in a clamp stand a substance containing temporary hardness and the other in no. Slightly sour as it is used in laboratories is either basic, or. 2 acids, Bases and Salts Class 10 Science Chapter 2 mcq ( Multiple Choice Questions of... 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