ph questions class 10

(b) It is because H2SO4 is strong acid. What do you observe when you add a few drops of acetic acid to a test tube containing. 54.Which one of these has a higher concentration of H+ ions ? Answer. A. Answer. (a) Identify the most acidic and most basic solutions. 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. Answer: C. 10. It shows gas liberated is hydrogen. How will you distinguish between hydrochloric acid and ethanoic acid with the strip of a-universal pH paper ? It is called sodium carbonate decahydrate or washing soda. Give two examples. Answers and explanation of MCQ tests are given just below each questions. Put a small strip of universal indicator in each of them. Conclusion : Crystalline substances have water of crystallization which are lost on heating. An unknown organic liquid does not turn blue litmus red and gives no effervescence with sodium hydrogen carbonate. Procedure: (b) When water is added to the white solid X, product Y formed is calcium hydroxide. 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. 5.Bring a burning matchstick near the gas jar and record your observations. All metal carbonates and hydrogen carbonates react with acids to form corresponding salts, water and carbon dioxide. Also, write a balanced chemical equation for the reaction which occurred. NCERT Exemplar Solutions for Class 10 Science, Value Based Questions in Science for Class 10, Previous Year Question Papers for CBSE Class 10 Science, CBSE Important Extra Questions for Class 12 Economics Chapter Wise, MCQ Questions for Class 12 Geography Chapter 5 Primary Activities with Answers, MCQ Questions for Class 12 Geography Chapter 4 Human Development with Answers, MCQ Questions for Class 12 Geography Chapter 3 Population Composition with Answers, MCQ Questions for Class 12 Geography Chapter 2 The World Population: Distribution, Density and Growth with Answers, Geography Class 12 Important Questions Chapter 7 Mineral and Energy Resources, Class 12 History Important Questions Chapter 13 Mahatma Gandhi and the Nationalist Movement: Civil Disobedience and Beyond, MCQ Questions for Class 12 Geography Chapter 1 Human Geography: Nature and Scope with Answers, Geography Class 12 Important Questions Chapter 6 Water Resources, MCQ Questions for Class 12 History Chapter 15 Framing the Constitution: The Beginning of a New Era with Answers, Concise Mathematics Class 10 ICSE Solutions. (ii) lowerH+ concentration respectively. Answer. Answer: Answer: Answer: 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. Answer: Calcium sulphate hemihydrate. Hold it with a clamp and heat the tube over a burner. However, when a dry piece of sodium pellet is added to the liquid, a gas is evolved with brisk effervescence. Answer. Answer: Solution-D (Weakly basic); Solution-B (Neutral); (ii)It liberates CO2 with H2SO4, which extinguish fire. NaOH (Sodium hydroxide). Substances that have a pH level of less than 7 are acidic in nature. (a) Five solutions A, B, C, D and E when tested with universal indicator showed pW as 4, 1, 11,7 and 9 respectively. List two main observations, he must note in his note book, about the reaction that takes place. If precipitate appears, filter it out. We have Provided Acids, Bases and Salts Class 10 Science MCQs Questions with Answers to help students understand the concept very well. (a) Write chemical name and formula of the powder. 41. Answer: Required fields are marked *, Concise Mathematics Class 10 ICSE Solutions 2018, Practical Based Questions for Class 10 Science Chemistry. fermentation will take place slowly. (ii)Tomatoes and Guava. Answer. Sodium hydrogen carbonate test. 20 seconds . Write the chemical reaction taking place when the powder is heated during baking. Write one of its uses. Practice that feels like play! (i) State the method that should be followed with reason. It is converted into washing soda by heating followed by crystallization. 47.What happens when chlorine is passed over slaked lime at 313K? 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 … Register online for Science tuition on Vedantu.com to score more marks in CBSE board examination. Which solutions is : Arrange the solutions in increasing order of H-ion concentration. (ii) Ca(OH) 2  (aq) + CO2   (g)—> Ca CO3  (s) + HaO(l). 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. Question 4 The pH of a solution is 5.What will be its action on blue and red litmus? You want to study a decomposition reaction by taking ferrous sulphate crystals in a boiling tube. You are given two colourless solutions present in two test tubes. 6.Explain the action of dilute hydrochloric acid on the following with chemical equation: Write chemical name and formula of X. (i) as an antacid A chemical is said to be acidic if it releases H + ions in its aqueous solutions. (ii) What will happen in the above observation made by you after ten minutes ? (a) Identify the acid and the base whose combination forms the common salt that you use in your food. (iv) For a dilution of acid, acid is added into water and not water into acid. 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. Conclusion: Crystalline substances have water of crystallisation which are lost on heating. It neutralizes excess of acid and gives relief from pain caused by hyperacidity. Which of the following statement is correct regarding pH Scale? (c) What happens when electricity is passed through brine? 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. Because hydrogen sulfate is a weak acid, this problem becomes very similar to the last one (see ). (c) State the change in colour of pH paper on dipping in solution C and D. How can it be prevented? 55.What is the colour of litmus in a solution of ammonium hydroxide? (ii)Dry HCl does not form ions but HCl gives H+ and Cl–. How will you test for the gas which is liberated when hydrochloric acid reacts with an active metal? (ii) Write balanced chemical equation for the above change. Answer: Hope given Practical Based Questions for Class 10 Science Chemistry helpful to you. (b) How is washing soda is obtained from baking soda? 15. (i) Oxalic acid (ii) Acetic acid (iii) Tartaric acid. It is used to determine the strength of aci d/base. Heat crystals in boiling tube. How is it prepared? The red litmus will change to blue in sodium carbonate solution. Acids Bases and Salts Class 10, Summary, Explanation and Notes of Acids Bases and Salts Science Chapter 2 . (i) Name the compound which is obtained from baking soda and is used to remove permanent hardness of water. Substances that have a … Internal Assessment will give you the opportunity to score the remaining 20 marks. Question from very important topics are covered by NCERT Exemplar Class 11.You also get idea about the type of questions and method to answer in your Class 11th … Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 11.. 12. (b) (i) NaHCOs is antacid. 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-. Limestone, chalk, marble are different forms of calcium carbonate. (i) HCl is completely ionised in aqueous solution whereas acetic acid is partially ionised in aqueous solution. Write the relevant equations of all the reactions that take place. It is prepared by passing CO2 gas through saturated solution of ammonical brine. Answers and explanation of MCQ tests are given just below each questions. MCQs are important for the CBSE and other boards final exams. Question 1: Solution A is a strong acid, solution B is a weak acid, solution C is a strong alkali. How? Students can test their knowledge of calculating the pH or pOH of a solution with this quiz/worksheet. 168 times. How will you test for a gas which is liberated when HCL reacts with an active metal? Describe an activity to show that blue copper sulphate crystals contain water of crystallisation. Blue vitriol White Sodium hydrogencarbonate. 53.Why does 1 M HC1 solution have a higher concentration of H+ ions than 1 M CH3COOH solution? In the following list of acids, separate strong acids from weak acids. NCERT Solutions for Class 10 Chapter 2 Acids, bases and salts are prepared to help students in their exam preparation. It can be used as test for CO2 .The chemical reactions taking place are as follows: (ii) It is used for the manufacture of glass. How is it prepared? Observe vapours being condensed in test tube. Solution-C (Strongly acidic); (i) which one will have lower pH value. (i) Tap water contains ions which conduct electricity, distilled water does not contain ions. It is obtained from sea water. 30.State in brief the preparation of washing soda from baking soda. It becomes dirty white on heating due to loss of water molecules and it becomes amorphous. Take a small amount of the given sample in the test tube. (i) Dry pellets of a base ‘X’ when kept in bpen absorbs moisture and turns sticky. Acid reacts with Ca3(PO4)2 and cause tooth decay. Solution E – Violet. MCQs are important for the CBSE and other boards final exams. Which drink has the pH value of 9 ? 43.The pH of a sample of vegetable soup was found to be 6.5. Hydrochloric acid, citric acid, acetic acid, nitric acid, formic acid, sulphuric acid. Master this topic as you play. (i) Tomato (ii) Vinegar (iii) Tamarind Answer: Its chemical formula is CaO. Answer. Calcium sulphate hemihydrate. RD Sharma Class 11 Solutions Free PDF Download, NCERT Solutions for Class 12 Computer Science (Python), NCERT Solutions for Class 12 Computer Science (C++), NCERT Solutions for Class 12 Business Studies, NCERT Solutions for Class 12 Micro Economics, NCERT Solutions for Class 12 Macro Economics, NCERT Solutions for Class 12 Entrepreneurship, NCERT Solutions for Class 12 Political Science, NCERT Solutions for Class 11 Computer Science (Python), NCERT Solutions for Class 11 Business Studies, NCERT Solutions for Class 11 Entrepreneurship, NCERT Solutions for Class 11 Political Science, NCERT Solutions for Class 11 Indian Economic Development, NCERT Solutions for Class 10 Social Science, NCERT Solutions For Class 10 Hindi Sanchayan, NCERT Solutions For Class 10 Hindi Sparsh, NCERT Solutions For Class 10 Hindi Kshitiz, NCERT Solutions For Class 10 Hindi Kritika, NCERT Solutions for Class 10 Foundation of Information Technology, NCERT Solutions for Class 9 Social Science, NCERT Solutions for Class 9 Foundation of IT, PS Verma and VK Agarwal Biology Class 9 Solutions, CBSE Class 10 Previous Year Question Papers, NCERT Solutions for Class 10 Foundation of IT, NCERT Solutions for Class 10 Science Chapter 1, NCERT Solutions for Class 10 Science Chapter 2, Periodic Classification of Elements Class 10, NCERT Solutions for Class 10 Science Chapter 7, NCERT Solutions for Class 10 Science Chapter 8, NCERT Solutions for Class 10 Science Chapter 9, NCERT Solutions for Class 10 Science Chapter 10, NCERT Solutions for Class 10 Science Chapter 11, NCERT Solutions for Class 10 Science Chapter 12, NCERT Solutions for Class 10 Science Chapter 13, NCERT Solutions for Class 10 Science Chapter 14, NCERT Solutions for Class 10 Science Chapter 15, NCERT Solutions for Class 10 Science Chapter 16, CBSE Previous Year Question Papers Class 12, CBSE Previous Year Question Papers Class 10. Water, with a neutral pH of around 7, determines the solubility of many compounds. It regains its colour by absorbing water from atmosphere and becomes blue in colour. Check Your Work: 10.60 + 3.40 = 14.00. Write its chemical formula. (i) Sodium carbonate is obtained from baking soda and is used to remove hardness of water. It is prepared by heating gypsum at 373 K. HCl, gas jar, matchbox, delivery tube bent at two right angles, lime water. Write chemical equation of the reaction involved and state two uses of the product obtained. Answer. (c) Hydrogen gas will be formed. The given liquid is probably an alcohol (e.g., ethyl alcohol) which has no reaction with blue litmus or sodium hydrogen carbonate. Answer. (b) H2SO4 and HNO3    are strong acids. (a) Mention the pH range within which our body works. • Repeat the experiment with glucose solution. It is usually possible to ignore X in both the denominator and in the [A-] term in the numerator.Thus, = 10-5 X = 10-5 (0.02 /0.01) = 2 x10-5 = [H +] pH = -log(2 x10-5) = 4.7. This is chlor-alkali process. NCERT Exemplar Class 10 Science is very important resource for students preparing for X Board Examination. Online Test. 37.What is a neutralisation reaction? How is it converted into washing soda? Write which solution has more hydrogen ion concentration among the three and state the nature ‘acidic or basic’ of each solution. (iii) State two properties of an acid. (ii)When an acid reacts with a metal bicarbonate. The one which gives a brisk effervescence contains acetic acid while the other in which no effervescence is noticed contains ethyl alcohol. Greater than 7 C. Equal to 7 D. Greater than 14. Soluble bases are called alkalies, e.g. Give reaction involved in its preparation. Question 2. (b) Baking … Was Ou Assumption To Ignore CO32- Valid? 54.Which gas is generally liberated when a dilute solution of hydrochloric acid reacts with an active metal? Answer: The increasing order of H-ion concentration :C CH3CHO + H2O. Give three tests to identify these. Answer. Antacids neutralizes excess of acid in our body and gives relief from hyperacidity. If [H+] > 10-7, pH is less than 7 and the solution is acidic. (iv)Tartaric acid. This characteristic depends on the ions they release. If water is added to acid, bottle of acid will break. (a) Our stomach has pH equal to 2. 27. • Now add some water containing ethanol and put the switch ON. You want to perform an experiment to study a double displacement reaction in your school laboratory. The reaction is highly exothermic, therefore, constant cooling should be done. Download NCERT Chapters and Books in pdf format. (b) Fresh milk has a pH of 6. HCl with the help of thistle funnel. Answer. Write a chemical equation to show the reaction between Plaster of Paris and water. Question 23. (ii) While diluting an acid, why is it recommended that the acid should be added to water and not water to the acid? Its chemical formula is NaCl. Which of the following would change the colour of this pH paper to greenish-blue? (a) Universal indicator is the mixture of synthetic indicators which is used to find pH of solutions. Iron has displaced copper from copper sulphate solution and has changed to iron sulphate which is light green in colour. A metal A’ gives a compound ‘B’ (molecular mass 40) when it reacts with water. 7 months ago. Antacid is basic in nature. (i) Identify the compound. As expected, the pH paper acquired green colour. Bring a burning splinter near the gas. (ii) Why cake or bread swells on adding baking powder? Name two aqueous solutions required for the experiment. (c) universal indicator There will not be any change in the colour of the pH paper. (i) The acid is to be added slowly in water to prevent the mixture to be splashed. See more information about the pH formula below. (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. (i) What do you observe as soon as the two solutions are mixed together ?

Gull Lake Ice Fishing Report, Scarlett Johansson Wedding Dates Colin Jost, Twitter Sentiment Analysis, Cultural Issues In Medicine, Is Damdama Lake Open, Parking Lot Striping Cost Calculator,

发表评论