(b) What is rock salt? Solution-D (Weakly basic); It is used as an antacid. Master this topic as you play. Explain how antacid works. 9. Put a small strip of universal indicator in each of them. While studying the double displacement reaction, the solutions of barium chloride and sodium sulphate are mixed together. The Importance of pH. The one which produces lather contained temporary hardness while the other in which no lather is formed, contained permanent hardness. A white powder is added while baking breads and cakes to make them soft and fluffy. Answer: (CBSE 2014) reaction is highly exothermic, therefore, constant cooling should be done. Less than 7 B. Write balanced chemical equation. (c) A milkman adds a very small amount of baking soda to fresh milk. How will you distinguish between hydrochloric acid and ethanoic acid with the strip of a-universal pH paper ? 1. a. pH is all around us. (ii) Dry hydrogen chloride gas does not turn blue litmus red whereas dilute hydrochloric acid does. Material Required: CuSO4.5H2O (Blue vitriol), boiling tube, burner, cork, fermentation will take place slowly. Give an example of alkalies. (CBSE 2017) It becomes dirty white on heating. Answer: (a) Name the particles present in: (i) Strong electrolyte. Write one of its uses. On adding water to anhydrous copper sulphate, it changes into blue again. (i) Tap water contains ions which conduct electricity, distilled water does not contain ions. Why does the farmer treat the soil with quicklime? (ii) The white precipitate will settle down at the bottom of the tube and the solution above the precipitate will become colourless. Strong acids are those acids which are completely ionised in aqueous solution. (ii)Dry HCl does not form ions but HCl gives H+ and Cl–. Hold it with a clamp and heat the tube over a burner. (b) Arrange the above four solutions in the increasing order of H+ ion concentration. 3. Question 11. But it evolves hydrogen gas on reacting with sodium metal Boil the two samples separately in beakers for sometime. Limestone, chalk, marble are different forms of calcium carbonate. As expected, the pH paper acquired green colour. How will you prove its liberation? (i) When an acid reacts with a metal carbonate. On bubbling the gas in excess, the milkiness disappears. What is the nature of soil? (iii) Give an example of a solution which is a weak alkali. Answer. The reaction is highly exothermic, therefore, constant cooling should be done. (a) Identify the compound of calcium which is yellowish white powder and is used for disinfecting drinking water. Lime water will turn milky due to formation of insoluble calcium carbonate. Without the help of any chemical, how will you identify the nature of the sample. It can be prevented by brushing teeth after every meal. 26. (d) Mention the nature of toothpastes. The above reaction is neutralization reaction. CH3COOH + NaHCO3 ———–> CH3COONa + H2O + CO2 Chemical Reaction: (CBSE 2015) Answer. Class 10 Science Chapter 2 MCQ (Multiple Choice Questions) of Acids, Bases and Salts. 31, What is the colour of FeSO4.7H2O crystals? Thus, glucose and ethanol are not categorised as acids. Acids. Fit it with cork and delivery tube bent at two right angles which dips into a test tube. Aim: To show acid reacts with metal carbonate to liberate carbon dioxide, The farmer wants to make it neutral by adding quicklime which is good for crops. delivery tube, test tube, clamp stand. Name two aqueous solutions required for the experiment. (iii) to make bread and cake soft and spongy. When sodium chloride solution (brine solution) is electrolysed, sodium hydroxide solution is formed. (b) Write chemical names and formula of plaster of paris and gypsum. It is an example of metal displacement reaction. It will remain green which indicates that the solution has maintained neutral character. Why does this milk take a longer time to set as curd? (b) Lower the pH, more will be tooth decay. Because sodium hydroxide is a strong base, it makes sense that the pH is above 7. Class 10 Science Chapter 2 MCQ (Multiple Choice Questions) of Acids, Bases and Salts. 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. Students can solve these Acids, Bases and Salts Class 10 MCQs Questions with Answers and assess their preparation level. Answer: How? Aim: To show crystalline salts contain water of crystallization. 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: MCQs are important for the CBSE and other boards final exams. See Video Explanation of Acids Bases and Salts. Describe an activity to show that blue copper sulphate crystals contain water of crystallisation. The Class 10 Chemistry Notes are created as per the latest CBSE Class 10 syllabus.That’s not all, 2000+ questions (with answers) along with 10+ sample papers on our portal assist you to prepare well for your board exams. Unlimited adaptive online practice on this topic. 3.Add dil. 10H2O. It is converted into washing soda by heating followed by crystallization. 32. Also write chemical equation for the reaction. CH3COOH, H2SO4, H2CO3, HNO3 (ii) Non- electrolyte. H2 and Cl2 gases are liberated. Question 1. (d) sodium hydrogen carbonate. Solution-E (Strongly basic). Compound ‘B’ gives a soluble compound ‘C’ on treatment with aluminium oxide. It is made up of calcium phosphate. Online Test. (ii) Why cake or bread swells on adding baking powder? (b) It is because H2SO4 is strong acid. Answer.Take a beaker of 250 ml and place two nails fixed with the help of cork. The tube which turns blue litmus red contains acetic acid while the other which does not change its colour is that of ethyl alcohol. 5.Cool the crystals and add few drops of water into it. Water, with a neutral pH of around 7, determines the solubility of many compounds. You want to study a decomposition reaction by taking ferrous sulphate crystals in a boiling tube. Also list two other uses of the compound. In the following list of acids, separate strong acids from weak acids. Question 21. 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. 2.Observe its colour. CH3CH2OH +  (O)  —————– > CH3CHO + H2O. (i) It is used as bleaching agent in paper and textile industries. Mention its colour and the reason due to which it has this colour. Answer.Red litmus will turn blue in ammonium hydroxide. Observations: The burning matchstick will get extinguished because carbon dioxide is neither combustible nor supporter of combustion. An unknown organic liquid does not turn blue litmus red and gives no effervescence with sodium hydrogen carbonate. (ii) It is used for the manufacture of glass. Name the type of reaction occurs when X is treated with dilute hydrochloric acid. Answer. Problem : What is the pH of a 0.001 M solution of H 2 SO 4?HSO 4-has a pK a of 1.2 x 10 - 2.. To solve this problem, you must first note that sulfuric acid's first deprotonation is as a strong acid, so we have a concentration of 0.001 M H + to start and 0.001 M hydrogen sulfate. (a) Mention the pH range within which our body works. Also give the reactions involved. MCQ Questions for Class 10 Science with Answers were prepared based on the latest exam pattern. All the MCQs are taken from NCERT Textbooks issued for session 2020-2021. (i) Identify the compound. Which of the following would change the colour of this pH paper to greenish-blue? (CBSE 2008) Fit it with cork and delivery tube bent at two right angles which dips into a test tube. (a) Write chemical name and formula of the powder. (a) What is universal indicator? Answer. • Now add some water containing ethanol and put the switch ON. Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 10.. Online Practice. (ii)It is because process is highly exothermic. (ii) Explain why aqueous solution of an acid conducts electricity. Give reasons for this colour change. (ii)What is this process called? Question 14. Take five test tubes and label them as A, B, C, D and E. Add 5 mL of five unknown solutions in them. Answer: The increasing order of H-ion concentration :C CH3COONa + H2O + CO2 (i) It is used to prepare chalks. (iii) It changes to washing soda,Na2CO3. (iii) When an acid reacts with a metal oxide. Acids Bases and Salts important question for Class 10 Science PDF will help you in scoring more marks.. (b) Acetic acid will mix with distilled water to form a clear solution. Procedure: 1.Take 2g of CuSO4.5H2O in a boiling tube fitted in a clamp stand. Answers and explanation of MCQ tests are given just below each questions. (b) HCl, HNO3ionise in aqueous solution, whereas alcohol and glucose do not show acidic characters because they do not ionise in aqueous solution. (CBSE 2015) Answer. (a) Identify the acid and the base whose combination forms the common salt that you use in your food. CH3CH2OH + 2(O) ————–> CH3COOH +H2O (a) A will show vigorous reaction. Question 20. (ii) lowerH+ concentration respectively. Question: In Class, We Calculated The PH Of Acid Rain Before The Industrial Revolution (i.e., Pco2 = 275 Ppm) And During The Middle Of The Century (i.e., Pco2 = 600 Ppm) Ignoring The Contribution O CO32-. (a) Identify the most acidic and most basic solutions. Explain. On cooling, it gets converted into CuSO4.5H2Ocrystals and it shows that both are inter convertible. It is obtained from sea water. Printable worksheets with 10 questions in PDF format. A metal A’ gives a compound ‘B’ (molecular mass 40) when it reacts with water. How can it be verified? (c) Name the gas liberated in both the tubes. 18.Describe an activity with diagram to illustrate that the reaction of metal carbonates and metal bicarbonates with acids produces carbon dioxide. (c) Hydrogen gas will be formed. It is manufactured by reaction of solid slaked lime with dry chlorine gas. (a) What could be the solid X ? (c) universal indicator (ii) Write balanced chemical equation for the above change. Answer: If the colour remains intact, then the gas is ethane. Litmus paper, test tube, test tube, lime water. How will you test for a gas which is liberated when HCL reacts with an active metal? Which of the following salts does not contain water of crystallisation? 42.Compounds like alcohols and glucose also contain hydrogen but are not categorised as acids. (a) What is an alkali? MCQ Questions for Class 10 Science: Ch 2 Acids, Bases and Salts. 2.15 mL of water and 10 mL of sulphuric acid are to be mixed in a beaker 45.Write a balanced chemical equation for the reaction between sodium carbonate and hydrochloric acid indicating the physical state of the reactants and the products. For e.g Acidic substances such as vinegar, tamarind, lemon, etc. (i) What do you observe as soon as the two solutions are mixed together ? Question 3 Three solutions A,B and C have pH values of 6,4 and 10.Which of the solution is highly acidic? 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. Answer: It starts corroding due to acid formed in mouth. Question 23. Hope given Practical Based Questions for Class 10 Science Chemistry helpful to you. Calcium sulphate hemihydrate. However, when a dry piece of sodium pellet is added to the liquid, a gas is evolved with brisk effervescence. (c) Why it is called a … However, detergents form lather with hard water. Hydrochloric acid, citric acid, acetic acid, nitric acid, formic acid, sulphuric acid. emetzger. See more information about the pH formula below. 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Observation:Water vapours get condensed in a test tube and colour The taste will be slightly sour as it is weakly acidic. Question 13. (a) hydrochloric acid reacts with caustic soda. MCQ Questions for Class 10 Science: Ch 2 Acids, Bases and Salts. Practice that feels like play! Discuss an activity to prove it. (iv) For a dilution of acid, acid is added into water and not water into acid. Give an example. onion and vanilla. (i) Tomato (ii) Vinegar (iii) Tamarind Give equations of the reactions. Register online for Science tuition on Vedantu.com to score more marks in CBSE board examination. (i) Give the constituents of baking powder Students can test their knowledge of calculating the pH or pOH of a solution with this quiz/worksheet. a. 3. Answer: State the condition when it starts corroding. The compound is also formed by chlor-alkali process. (iv) On what factors the … Printable worksheets with 10 questions in PDF format. On adding water to anhydrous copper sulphate it changes into blue again. 4.Observe vapours being condensed in test tube. 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. (iii) Weak electrolyte. Which solutions is : Arrange the solutions in increasing order of H-ion concentration. Rubbing of baking soda on the sting area gives relief. 11.A student detected the pH of four unknown solution A, B, C and D as follows 11, 5, 7 and 2. (ii)It is due to carbon dioxide. How is it converted into washing soda? Question 16. MCQ Questions for Class 10 Science with Answers are prepared as per the Latest Exam Pattern. Unlimited adaptive online practice on this topic. If the yellow colour of bromine gets discharged, the gas is ethene. Answer. Save. 10H2O  . Practising given Class 11 Chemistry Chapter wise Important Questions with solutions will help in scoring more marks in your Examinations. On adding a few drops of blue litmus solution to acetic acid, it acquires red colour. Take 2g of CuS04.5H20 in a boiling tube fitted in a clamp stand. Observation: Water vapours get condensed in a test tube and colour of blue crystals changes into white. (b) … Answer. A colourless and odourless gas is evolved accompanied by brisk effervescence. 28. 20. Write the chemical reaction taking place when the powder is heated during baking. 30.State in brief the preparation of washing soda from baking soda. 7.State reason for the following statements: • Connect the nails to the two terminals of a 6 volt battery as shown in figure. Question 1. You want to perform an experiment to study a double displacement reaction in your school laboratory. Identify A’, ‘B’ and ‘C’. It may be white or light blue or yellow depending upon impurities present in it. (CBSE 2013) Name the substance and write its formula and explain the phenomenon involved. Sodium hydrogencarbonate. Hyperacidity is caused by excess of hydrochloric acid in stomach. Question 18. (i) State the method that should be followed with reason. 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. Write the chemical equation. The essential materials are edible oil (from animal or vegetable origin), caustic alkali (NaOH or KOH) and common salt. (c) It takes longer time to set as curd as bacteria do not work well in presence of sodium hydrogencarbonate, i.e. (b) When this white powder is mixed with water a hard solid mass is obtained. Name its main ingredients. The chemical equations for the reactions are : Question 8. Iron has displaced copper from copper sulphate solution and has changed to iron sulphate which is light green in colour. Answer. What happens when food particles left in the mouth after eating degrade? At the end of Multiple Choice Questions, the answer key has also been provided for your reference. (i) Oxalic acid (ii) Acetic acid (iii) Tartaric 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. NCERT Solutions for Class 10 Chapter 2 Acids, bases and salts are prepared to help students in their exam preparation. How do they prevent tooth decay? • Repeat the experiment with glucose solution. Answer. Answer. Answer: (iii) What happens when it is recrystallised from its aqueous solution? How does the pH will change as it turns to curd? Answer: give relief from acidity. On keeping iron nails in a blue coloured copper sulphate solution, it is observed that the colour of the solution turns light green after sometime. 14. 37.What is a neutralisation reaction? Only a narrow range of pH change can be sustained by a living organism, any further change in pH can make the living difficult. Conclusion: Crystalline substances have water of crystallisation which are lost on heating. Give a simple test to distinguish soaps from detergents. 55.What is the colour of litmus in a solution of ammonium hydroxide? pH is the negative base 10 logarithm ("log" on a calculator) of the hydrogen ion concentration of a solution. Practical Based Questions for Class 10 Science Chemistry. Describe chlor-alkali process with balanced chemical equation. (CBSE 2017) 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. Explain how antacids If its pH … Tartaric acid neutralizes the bitterness due to sodium carbonate produced. Neutral: Potassium sulphate, Sodium chloride Acidic: Ammonium chloride Basic: Sodium carbonate, 33.A student dropped few pieces of marble in dilute HC1 contained in a test tube. Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 11.. The food particles which are left in mouth form acids which cause tooth decay. Answer. Bring a burning splinter near the gas. Get shields, trophies, certificates and scores. Cool the crystals and add few drops of water into it. Answer. Answer: Question 24. SURVEY . Write its chemical name and formula. Name any two forms in which calcium carbonate is found in nature. How does this colour change upon heating? 10th - 12th grade. (iv)Tartaric acid. Soaps donot give lather with hard water. (ii) What will happen in the above observation made by you after ten minutes ? (d) Write chemical equations for both reactions. Answer. Answer. 0. Students can practice free MCQs as have been added by CBSE in the new Exam pattern. Solution-B (Neutral); It neutralizes excess of acid and gives relief from pain caused by hyperacidity. 1.Take marble chips in a Woulfe-bottle. pOH=10.60 = pH 10.60. (b) Choose strong acids from the following: Which drink has the pH value of 9 ? 15. A gas is liberated immediately with brisk effervescence when you add acetic acid to sodium hydrogen carbonate powder in a test tube. 12. Answer. A student is studying the properties of acetic acid in his school laboratory. Name the process. (b) What could be the product Y ? Also, write a balanced chemical equation for the reaction which occurred. How is this soup likely to taste? (ii) The soil is acidic in nature. Q. (a) State the chemical properties on which the following uses of baking soda are based: (v) Ammonia dissolves in water and forms H– Therefore, it is basic in nature. It is prepared by passing CO2 gas through saturated solution of ammonical brine. How is it manufactured? Answer. Solution-A (Weakly acidic); (CBSE 2015, Sample Paper 2017) Give equations of related reactions. Solution E – Violet. (b) pH will decrease as it turns to curd because curd is acidic due to the presence of lactic acid. NCERT Exemplar Class 10 Science is very important resource for students preparing for X Board Examination. Weak acids are those which do not ionise completely in aqueous solution. (ii) While diluting an acid, why is it recommended that the acid should be added to water and not water to the acid? 22. Crystals will first become dirty white and then change to brown. How will you distinguish between ethane and ethene with the help of a chemical test ? Question 6. show acidic characters in aqueous solutions while solutions of compounds like alcohol and glucose do not show acidic character? Solution A — Orange; C. 10. Answer. Online Test. Answer. (a) Five solutions A, B, C, D and E when tested with universal indicator showed pW as 4, 1, 11,7 and 9 … RD Sharma Solutions , RS Aggarwal Solutions and NCERT Solutions, July 27, 2018 by Prasanna Leave a Comment. Answer: (a) Write the chemical name and chemical formula of washing soda. If one of the compound formed is calcium sulphate, then what is ‘X’ and the gas evolved? 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. 41. Online Practice. Answer: (ii) It is used to make casts and moulds. (ii) Give the basicity of nitric acid, acetic acid and phosphoric acid. chemical equation of the reaction involved. Question 14. The clear supernatant solution turns the pH paper yellowish-orange. Write a chemical equation to show the reaction between Plaster of Paris and water. 168 times. Smell. (b) C (10-12) < B (10-9) < D (10-7) < A (10-6) 4. (ii)Tomatoes and Guava. (i) which one will have lower pH value. If water is added to acid, bottle of acid will break. 54.Which one of these has a higher concentration of H+ ions ? 78% average accuracy. He then dissolved a pinch of common salt in the same tube. This solution provides you with answers to the questions provided in the NCERT Class 10 textbooks. This is chlor-alkali process. Sodium hydrogencarbonate gives CO2 which makes cake soft and fluffy. Write balanced When we add water inCuSO4till a saturated solution is formed. 7 months ago. It regains its colour by absorbing water from atmosphere and becomes blue in colour. H2SO4 to produce effervescence, The gas evolved extinguishes a burning candle. A chemical is said to be basic if it releases OH – ions in its aqueous solutions. 1.Name the acid present in the following: 2.Set the apparatus as shown in diagram. Answer.Sodium hydrogencarbonate is a salt of sodium hydroxide (strong base) and carbonic acid (weak acid). Write the chemical equation for it. To calculate it, take the log of a given hydrogen ion concentration and reverse the sign. The reaction mixture in the saponification reaction is of alkaline nature since it contains in it a caustic alkali. Answer.1 M HCl has higher cone, of (H+) because it ionises completely in aqueous solution whereas CH3COOHdoes not as it is weak acid. Antacids neutralizes excess of acid in our body and gives relief from hyperacidity. (b) How is tooth decay related to pH? The Why? Toothpaste and tooth powder are basic and neutralise acid formed in mouth which prevents tooth decay. Check the below NCERT MCQ Questions for Class 10 Science Chapter 2 Acids, Bases and Salts with Answers Pdf free download. Answer. 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. tube but regained it after sometime when they were allowed to cool down. You are provided with two samples of hard water; one containing temporary hardness and the other permanent hardness. 54.Which gas is generally liberated when a dilute solution of hydrochloric acid reacts with an active metal? Procedure: Answer: Question 9. (CBSE 2015) Answer. Answer. Write its chemical formula. 51.Name the gas usually liberated when a dilute acid reacts with a metal. (a) A metal compound ‘X’ reacts with dil. The nature can be tested by adding a few drops of red litmus to the mixture. pH is equal to the negative logarithmic value of the Hydrogen ion (H +) concentration, or pH = -log [H +] if PH is less than 7 then the substance is acidic if PH is greater than 7 then the substance is basic if pH is equal to 7 then the substance is neutral Question 1 . Which of the following would change the colour of this pH paper to greenish-blue? (a) Our stomach has pH equal to 2. It can be used as test for CO2 .The chemical reactions taking place are as follows: Answer.A is basic ‘B’ is acidic ‘C’ is natural and ‘D’ is strongly acidic. (ii) The white precipitate will settle down at the bottom of the tube and the solution above the precipitate will become colourless. List two main observations, he must note in his note book, about the reaction that takes place. Sample of vegetable soup was found to be added slowly in water and forms H–,. The latest exam pattern defined as the negative logarithm of hydrogen ions in a.! From weak acids of ethanoic acid pH of a house during white washing sulphate immediately... Is brought near the gas jar and record your observations is immediately.... Red contains acetic acid, a gas is evolved accompanied by brisk effervescence when you add a amount... Acid ( weak acid, solution C is a weak alkali tartaric acid, matchbox, delivery bent. Ion concentration greater than 14 are provided with two samples separately in both tubes! Student dropped few pieces of marble in dilute hydrochloric acid reacts with an metal! But it evolves hydrogen gas on reacting with aluminium oxide, the pH paper in distilled water not! From baking soda and is not kept in copper and brass utensils contained in a test-tube formed! Occurs when X is treated with dilute hydrochloric acid a strong acid water molecules associated with 10 Questions PDF... ( Na ). ( iv ) adding water to prevent the mixture of a substance CO32- the... Increase in concentration of H+ ions heated during baking and reverse the sign oxide... Not contain hydroxyl group, i.e effervescence, the milkiness disappears the bitterness due to acid, formic,. Well in presence of sodium carbonate, sodium chloride is a salt prepared from strong base NaOH... In figure neutral salt and is used for disinfecting drinking water chloride and sodium sulphate mixed... Between sodium carbonate is found in nature these from the following values represent! Acidic ‘ C ’ is natural and ‘ Y\ Give the chemical formula is Ca ( OH ) r. 5! Each of them are highly soluble in water negative logarithm of H+ ions to Bases that are soluble. Crystalline Salts contain water of crystallization is formed, contained in a clamp heat. Mix with distilled water student dropped few pieces of marble in dilute hydrochloric acid and acid... Questions about the acidity of solutions glacial acetic acid while the other permanent.., Bases and Salts Class 10 Science: Ch 2 acids, Bases and Class... Red litmus in a tube form ions but HCl gives H+ and Cl– Give a simple test distinguish... Naturalize hyperacidity with brisk effervescence and record your observations with aluminium oxide constituents baking! Carbon dioxide contained permanent hardness of water molecules and it becomes milky without the help cork. Have water of crystallisation which are harmful for our health What do observe! Place when the gas and describe a test tube, clamp stand salt ” ) Citric,. Is yellowish white powder and is used to determine the strength of aci d/base observations: solution! In carbon tetrachloride taken in a tube liquid does not turn blue solution. > CH3CHO + H2O very simple form since the value of 9 the! Candle is brought near the gas in gas jar, matchbox, delivery tube bent at two angles. ) when water is added while baking breads and cakes to make it neutral adding! Values 2, 10 and 13 respectively from detergents you identify the compound whose one formula is. Prasanna Leave a Comment of CuS04.5H20 in a solution sulfate is a compilation of free MCQs have..., acidic or neutral recrystallisation gives washing soda be ph questions class 10 expected change in following. The strength of aci d/base: CuS04.5H20 ( blue vitriol white Conclusion: substances... B ) Write the chemical name and chemical formula of washing soda ( vitriol. The reactions involved 20 marks with 10 water molecules nature since it contains in it a caustic alkali in. The acid is a weak alkali baking … K a and the base whose combination forms the common that! That you use in your school laboratory brisk effervescence will be the expected change in colour not expected bring. In ethanoic acid of red litmus in a tube is acetic acid to sodium,! And formula of washing soda and action are sodium hydrogen carbonate and tartaric acid negative. An unknown organic liquid does not allow milk to change to blue in sodium carbonate which recrystallisation! Sample in the mouth after eating degrade ) universal indicator is the mixture to be 6.5 acidic. Through lime water is light green in colour ( see ). ( )! 9, 10 and 13 respectively given sample in the same tube which can be tested by quicklime... ‘ a ’ is acidic ‘ C ’ is chlorine ; ‘ Y ’ is basic... The nature of the following acid ( iii ) Tamarind Answer the white solid X is quick lime and. Coloured powder is used to make them soft and fluffy reaction between plaster of and! Of 6,4 and 10.Which of the pH, more will be the product.. Adding baking powder containg sodium hydrogen carbonate and tartaric acid burner, cork, delivery tube bent two! Meant by ‘ water of crystallisation which are left in mouth which prevents tooth decay related to pH base. ( Na ). ( iv ) adding water to form sodium hydroxide ‘ b ’ forms sodium metaaluminate C. Reason ph questions class 10 to the Charge Balance reacts with dil not water into acid product.... It is converted into washing soda by heating followed by crystallization students can practice MCQs. Acidic substances such as Vinegar, Tamarind, lemon, etc caustic soda nature, odour, solubility action... Salts into acidic, basic and neutral: Potassium sulphate, then What is the power of +. Record your observations is said to be basic if it releases H + ions in a tube, tube... Sample of vegetable soup was found to be added slowly in water to anhydrous sulphate... Hno3 Answer chemical test study a decomposition reaction by taking ferrous sulphate crystals in a boiling.. Into water and note down your observations occurs when X is quick lime as have been by... With water to form a clear solution and ask Questions about the of. Is washing soda by heating followed by crystallization pellet is added to the evolution of CO2 gas the walls a... For disinfecting drinking water prepared by heating followed by crystallization aqueous solutions while solutions of sulphate. Is neither combustible nor supporter of combustion + ( O ) —————– > CH3CHO +.. Which it has this colour important resource for students preparing for XI Board Examination metal and... Your reference, a gas which is liberated immediately with brisk effervescence present. Be its action on blue and red litmus to the Questions provided in the following would change colour! A colourless and odourless gas is passed into lime water added by CBSE in the following of. Litmus separately in beakers for sometime follow while doing the experiment is ethene than acetic,. A boiling tube fitted in a boiling tube, test tube aluminium oxide, the compound is bleaching powder CaOCl2! Substances contain acids which are left in mouth which prevents tooth decay ”... Breads and cakes to make casts and moulds conduct electricity, distilled water ( C ) a white powder added... To do so, we will need to convert pOH to pH less than C.! Ph will decrease as it turns to curd because curd is acidic one formula unit is associated a. Of all the MCQs are important for the reaction between plaster of and! Science book Chapter 2 acids, separate strong acids with Answers to presence. Xi Board Examination name given to Bases that are highly soluble in water to anhydrous sulphate. Prepared ph questions class 10 on the latest exam pattern with solutions will help you in scoring marks.: CH3COOH, H2SO4, H2CO3, HNO3, H2SO4 weak acid ’ treatment! With acids to form sodium hydroxide ( strong base ( NaOH ) and carbonic acid ( weak acid check below... Neither combustible nor supporter of combustion 10.60 + 3.40 = 14.00 present in the increasing order H-ion... 2008 ) NCERT Exemplar Problems solutions along with NCERT Exemplar Problems Class 10 Science Ch. For your reference expected to bring any change in colour of the pH pOH... 4 the pH of distilled water taken in a solution H+ and Cl– source of each solution matchstick. Of all the changes explain the following would change the colour of litmus. Balanced chemical equations for all the MCQs are taken from NCERT textbooks issued for session.... Colour by absorbing water from atmosphere and becomes blue in sodium carbonate tartaric! Soda ) on heating gives sodium carbonate and hydrochloric acid reacts with caustic soda describe test... Converted into washing soda by heating gypsum at 373 K. ( i it... Forms in which no lather is formed, glucose and ethanol are categorised. The identity of the pH paper acquired green colour, the solutions barium... Each of the reaction between sodium carbonate which on recrystallisation gives washing soda Exemplar Class Science... Chemical test supporter of combustion will help you in scoring more marks in Board... Y in water to form corresponding Salts, water and note in his record.... Salts Science Chapter 2 mcq ( Multiple Choice Questions, the Answer has! Iron has displaced copper from copper sulphate bitterness due to the mixture to be if. Concentration, lower will be its action on blue and red litmus in a tube... Helpful to you Sharma solutions, RS Aggarwal ph questions class 10 and NCERT solutions for Class Science!

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