Take 2g of CuS04.5H20 in a boiling tube fitted in a clamp stand. Acids/Bases and Salts DRAFT. (b) granulated zinc reacts with caustic soda. Uses: Answer: A suspension of Y in water is applied to the walls of a house during white washing. Give an example. (iii) Give an example of a solution which is a weak alkali. It is prepared by passing CO2 gas through saturated solution of ammonical brine. (CBSE 2017) Name the acid and base from which the following salts have been formed : Question 4. Cool the crystals and add few drops of water into it. Solution B — Green; CH3CH2OH + 2(O) ————–> CH3COOH +H2O How can it be prevented? Also list two other uses of the compound. Check Your Work: 10.60 + 3.40 = 14.00. HCl with the help of thistle funnel. (a) What is universal indicator? (b) (i) Name one antacid. CuSO4 is anhydrous copper sulphate. 5.Cool the crystals and add few drops of water into it. Answer: A gas is liberated immediately with brisk effervescence when you add acetic acid to sodium hydrogen carbonate powder in a test tube. How is this soup likely to taste? It consist of sodium hyrogencarbonate and tartaric acid. (ii)It is due to carbon dioxide. It is obtained from sea water. Answer: The increasing order of H-ion concentration :C 10-7, pH is less than 7 and the solution is acidic. Its chemical name is calcium oxychloride. Answer. in a solution have on the pH of solution? (i) Explain why is hydrochloric acid a strong acid and acetic acid, a weak acid. Answer: Question 9. Observation:Water vapours get condensed in a test tube and colour 56.What is meant by ‘water of crystallisation’ of a substance ? Answer: All metal carbonates and hydrogen carbonates react with acids to form corresponding salts, water and carbon dioxide. It burns with ‘pop’ sound showing that it is hydrogen. How does it help tq relieve indigestion in stomach? How will you prove its liberation? (a) Write the chemical formula of hydrated copper sulphate and anhydrous copper sulphate. 5. [H +] in solution with pH 5.0 = 10-5 M [H +] in solution with pH 6.0 = 10-6 M As 10-5 > 10-6 hence, solution with pH 5 is more acidic. 11.A student detected the pH of four unknown solution A, B, C and D as follows 11, 5, 7 and 2. (iii) to make bread and cake soft and spongy. On reacting with aluminium oxide, the compound ‘B’ forms sodium metaaluminate ‘C. Answer. Antacid is basic in nature. MCQs are important for the CBSE and other boards final exams. Give a simple test to distinguish soaps from detergents. Chemical Reaction: 18.Describe an activity with diagram to illustrate that the reaction of metal carbonates and metal bicarbonates with acids produces carbon dioxide. Here is a compilation of Free MCQs of Class 10 Science Book Chapter 2 – Acids, Bases and Salts. The strip of universal pH paper will turn red in hydrochloric acid while its colour will change to orange in ethanoic acid. Observation : K The bulb will not glow and the needle of ammeter will not show deflection because glucose and ethanol do not conduct electricity. Answer. Save. (ii) It is used for the manufacture of glass. If [H+] = 10-7, pH is 7 and the solution is neutral. It is made up of calcium phosphate. At the end of Multiple Choice Questions, the answer key has also been provided for your reference. The above reaction is neutralization reaction. State the condition when it starts corroding. (iii) Weak electrolyte. 24. 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. 9. To score better marks in Class 10 science examination students should get well versed with the NCERT Solutions provided here. The nature of the chemicals used in laboratories is either basic, acidic or neutral. Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 10.. 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. (ii) Dry hydrogen chloride gas does not turn blue litmus red whereas dilute hydrochloric acid does. (c) It takes longer time to set as curd as bacteria do not work well in presence of sodium hydrogencarbonate, i.e. What will happen if excess of gas is passed through lime water? 2C2H5OH + 2Na ————> 2C2H5ONa + H2. On adding a few drops of blue litmus solution to acetic acid, it acquires red colour. 8. (a)CuSO4.5H2O is hydrated copper sulphate. He then dissolved a pinch of common salt in the same tube. Question 1. 53.Why does 1 M HC1 solution have a higher concentration of H+ ions than 1 M CH3COOH solution? CH3COOH, H2SO4, H2CO3, HNO3 Write the relevant equations of all the reactions that take place. The chemical equations for the reactions are : Question 8. (c) A universal indicator will impart orange colour to acetic acid. This characteristic depends on the ions they release. (ii) Non- electrolyte. 1. How is it manufactured? (i) When an acid reacts with a metal carbonate. This consists of 1 mark Questions, 3 Mark Numericals Questions, 5 Marks Numerical Questions and previous year questions from Metals and Non-Metals Chapter. Choose strong acid and strong base from the following: CH 3 COOH, NH 4 OH, KOH, HCI Answer: Strong acid—HCI, Strong base—KOH. Download NCERT Chapters and Books in pdf format. 9. 4.Collect the gas in gas jar by upward displacement of air. (ii) The white precipitate will settle down at the bottom of the tube and the solution above the precipitate will become colourless. Practice that feels like play! Ans. What is baking soda chemically called? A student adds a spoon full of powdered sodium hydrogen carbonate to a flask containing ethanoic acid. Identify A’, ‘B’ and ‘C’. How can it be verified? Answer: It will remain green which indicates that the solution has maintained neutral character. How will you test for the gas which is liberated when hydrochloric acid reacts with an active metal? Which of the following salts does not contain water of crystallisation? (b) How is it obtained from sodium chloride? Substances that have a … 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 a is a strong acid, this problem becomes very similar to walls! End of Multiple Choice Questions ) of the reaction between sodium carbonate is found in nature supernatant turns! Evolved accompanied by brisk effervescence, clamp stand of cork two solutions solution and has changed to sulphate... 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