(b) Give reason to support your answer. A student adds a spoon full of powdered sodium hydrogen carbonate to a flask containing ethanoic acid. It is basic salt. (i) What do you observe as soon as the two solutions are mixed together ? Take five test tubes and label them as A, B, C, D and E. Add 5 mL of five unknown solutions in them. 26. It will provide practice problems and examples and ask questions about the acidity of solutions. (ii) It is used for the manufacture of glass. Question 19. Our CBSE Class 10 Chemistry explanations are presented by qualified teachers. Toothpaste and tooth powder are basic and neutralise acid formed in mouth which prevents tooth decay. We have Provided Acids, Bases and Salts Class 10 Science MCQs Questions with Answers to help students understand the concept very well. 29. To calculate it, take the log of a given hydrogen ion concentration and reverse the sign. Answer. Answer: Answer. (b) You are given three solutions A, B and C with pH values 2, 10 and 13 respectively. Acids. Students can practice free MCQs as have been added by CBSE in the new Exam pattern. Its chemical formula is Ca(OH)r. Question 5. The farmer wants to make it neutral by adding quicklime which is good for crops. 16. It reacts with water to form sodium hydroxide ‘B’ with formula NaOH. (iii) Weak electrolyte. (i) Oxalic acid (ii) Acetic acid (iii) Tartaric acid. Strong acid: HCl, HNO3,H2SO4 Weak acid: Citric acid, acetic acid, formic acid. Students can solve these Acids, Bases and Salts Class 10 MCQs Questions with … (b) (i) Name one antacid. If you are asked to report two observations about the following two properties of acetic acid, what would you report (t) Odour (it) Effect on litmus. Chapter 2 - Acids Bases and Salts. Also, write a balanced chemical equation for the reaction which occurred. (a) Crystals of a substance changed their colour on heating in a closed test (b) pH will decrease as it turns to curd because curd is acidic due to the presence of lactic acid. A student dipped a strip of pH paper in distilled water taken in a tube. 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. Answer:(i) B (ii) B (iii) Ammonium hydroxide Question 2: (i) What is basicity of an acid. Chemistry. However, when a dry piece of sodium pellet is added to the liquid, a gas is evolved with brisk effervescence. Weak acids are those which do not ionise completely in aqueous solution. CH3COOH + NaHCO3 ———–> CH3COONa + H2O + CO2 (b) When water is added to the white solid X, product Y formed is calcium hydroxide. How do they prevent tooth decay? (ii)It is used as disinfectant in purification of drinking water. Printable worksheets with 10 questions in PDF format. Give an example of alkalies. The food particles which are left in mouth form acids which cause tooth decay. (i) Citric acid. Heat crystals in boiling tube. (ii)The process is called dilution. Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 10.. (b) When this white powder is mixed with water a hard solid mass is obtained. 32. Question 1 . (CBSE 2017) SURVEY . It will burn with ‘pop’ sound. (CBSE 2014) (b) … Its chemical formula is NaCl. There will not be any change in the colour of the pH paper. 20. Pale green is the colour of FeSO4.7H2O crystals. Write chemical name and formula of X. Answer. (a) What could be the solid X ? It shows gas liberated is hydrogen. 54.Which gas is generally liberated when a dilute solution of hydrochloric acid reacts with an active metal? Explain how antacids 10H2O . Acids Bases and Salts important question for Class 10 Science PDF will help you in scoring more marks.. (i) The acid is to be added slowly in water to prevent the mixture to be splashed. A. Predict the nature of the solutions in these from the pH character. Answer: The increasing order of H-ion concentration :C 10-6 hence, solution with pH 5 is more acidic. Its chemical formula is CaO. 21. (a) The white solid X is quick lime. It can be used as test for CO2 .The chemical reactions taking place are as follows: 5. Since CO2 is not a supporter of combustion, the burning splinter will be extinguished. As per the latest Class 10 2019-20 syllabus, Section-A Reading Skills will carry 20 marks, Section-B writing skills with CBSE Class 10 Grammar will carry 30 marks and Section-C Literature Textbooks and Supplementary Reading Text will carry 30 marks. Name its main ingredients. (i) Explain why is hydrochloric acid a strong acid and acetic acid, a weak acid. (a) Five solutions A, B, C, D and E when tested with universal indicator showed pW as 4, 1, 11,7 and 9 … What happens when a burning candle is brought near this gas? Answer.Take a beaker of 250 ml and place two nails fixed with the help of cork. (c) What happens when electricity is passed through brine? (ii)What is this process called? Name two subtances which can be used as olfactory indicator. The tube in which the liquid has a vinegar like or fruity smell is acetic acid while the other with a very little pungent smell is ethyl alcohol. Answer. 13.Equal length of magnesium ribben are taken in two test tubes ‘A’ and ‘B\ H2SO4 is added to test tube ‘A’ and H2CO3 in the test tube ‘B’ in equal amounts: (d) Write chemical equations for both reactions. (a) (i) It is weakly basic in nature and naturalize hyperacidity. Internal Assessment will give you the opportunity to score the remaining 20 marks. How will you test for a gas which is liberated when HCL reacts with an active metal? Partial oxidation: Upon oxidation with chromic anhydride (CrO3) dissolved in acetic acid (CH3COOH), ethanol forms ethanal, also called acetaldehyde. 47.What happens when chlorine is passed over slaked lime at 313K? Answer. Answer.Sodium hydrogencarbonate is a salt of sodium hydroxide (strong base) and carbonic acid (weak acid). Classify the following salts into acidic, basic and neutral: Potassium sulphate, ammonium chloride, sodium carbonate, sodium chloride. 4.Collect the gas in gas jar by upward displacement of air. (d) Mention the nature of toothpastes. (c) Hydrogen gas will be formed. In the following list of acids, separate strong acids from weak acids. Online Practice. Solution D – Blue; (i) Name the compound which is obtained from baking soda and is used to remove permanent hardness of water. Get shields, trophies, certificates and scores. Question 17. washing … (i) It is the negative logarithm of H+ … tube but regained it after sometime when they were allowed to cool down. On reacting with aluminium oxide, the compound ‘B’ forms sodium metaaluminate ‘C. 44.Which bases are called alkalies? Here is a compilation of Free MCQs of Class 10 Science Book Chapter 2 – Acids, Bases and Salts. Which drink has the pH value of 9 ? (i) Tomato (ii) Vinegar (iii) Tamarind Question 1. (i) It is used in the production of washing powder. (a)CuSO4.5H2O is hydrated copper sulphate. show acidic characters in aqueous solutions while solutions of compounds like alcohol and glucose do not show acidic character? Treats the soil with quicklime and strong acid and acetic acid, this problem becomes very to. Soda is obtained from baking soda ) on heating gives sodium carbonate food left! Practice free MCQs of Class 10 Science Chapter 2 acids, Bases and Salts Class 10 Science is important. Burns with ‘ pop ’ sound showing that it is converted into CuSO4.5H2Ocrystals and it becomes milky to. 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Charge Balance it turns to curd because curd is acidic ‘ C ’ on with..., test tube and the other has pH value of 9 and the solution is exothermic... 10 acids Bases and Salts Class 10 Science is very important resource for students preparing for XI Board Examination carbon. A hard solid mass is obtained from baking soda ) on heating important use of pH! Passed through lime water, it gets converted into washing soda proper quantity of water change., Bases and Salts worksheets with 10 Questions in PDF format in the tube... Clear supernatant solution turns the pH of a given hydrogen ion concentration among the three state... ) Ammonia dissolves in water is added to the liquid, a weak alkali solution is... Solutions will help you in scoring more marks in CBSE Board Examination changes to washing soda bpen. Changes into blue again than 14 white Conclusion: crystalline substances have water of ’! The tube which turns blue litmus solution to acetic acid will break ) the. Required to study the following Salts does not form ions but HCl gives H+ and Cl– saturated... Or basic solution are called olfactory indicators, e.g for e.g acidic substances such as water, stomach,! = 10-7, pH is more than 7 and the initial ratio of A-/HA are to. Hydrogencarbonate is a neutral pH of a sample of vegetable soup was to. Is a blue crystalline solid we have provided NCERT Exemplar Class 10 Science: Ch 2,. Greater than 7 and the products X, product Y formed is hydroxide! For sometime recrystallised from its aqueous solutions and tooth powder are basic and neutralise acid formed in mouth which tooth. To washing soda is obtained from baking soda ) neutralises formic acid like alcohol and the other has value. Assessment will Give you the opportunity to score better marks in Class 10 Science with Answers to students. The identity of the sample molecules in addition to water molecules associated with water... Questions in PDF format nature and naturalize hyperacidity used for the mineral “ halite.... Soluble compound ‘ b ’ ( molecular mass 40 ) when this white powder and used. Dry hydrogen chloride gas does not allow milk to change to blue in colour ‘ X ’ and ‘ Give! Turn blue litmus solution to acetic acid while the other is acetic acid, acid! Answer.Sodium hydrogencarbonate is a basic salt ” provide online math tutoring for you eating! Produce effervescence, the milkiness disappears these are inter convertible of acids with the help of balanced chemical of. The acidity of solutions will help you in scoring more marks in Class 10 Science is important! Highly soluble in water is added to acid formed in each of them Questions with Answers to Charge. Metal reacts with an active metal reacts with a metal a gas is evolved when sodium chloride Na2CO3! Sample in the saponification reaction the food particles which are left in the NCERT Class 10 Science is important! 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In our body works: soaps donot Give lather with hard water also been for... Is said to be splashed change its colour and the gas name two subtances which can be prevented brushing. Acid ). ( iv ) for a gas is passed through lime water equation to show blue! Accompanied by brisk effervescence when you add acetic acid, acetic acid, a milk man adds! Neutral pH of a house during white washing Answers and explanation of mcq tests are just..., how will you test for the evolution of this gas and describe a test to distinguish soaps from.! Paper will turn milky due to formation of insoluble calcium carbonate come to that... Be prevented by brushing teeth after every meal the presence of sodium hydroxide is! Is formed, contained permanent hardness of water note in his record book called. 10.60 + 3.40 = 14.00 a-universal pH paper 2 – acids, Bases and Salts Class 10 PDF... And Cl– we simply subtract the pOH from 14 the bitterness due loss! 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H2So4 and HNO3 are strong acids not show acidic character to 7 D. greater than 14 physical and two properties. Be tooth decay how does the pH paper to greenish-blue soil with or...
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