What is the common name of the compound CaOCl2? If yes, why are these basic? Question 12 (c) distilled water (d) Petri dish is not required for doing experiment of pH. Working and construction of electric motor is discussed. Question 11 (d) As NaCl is a neutral solution due to its complete ionization in H2O and has pH = 7. Which solution is? Used for making toys, material for decor action, smooth surfaces. 220V is maintained between live wire which is insulated red and neutral wire which is insulated black. Answer: NaOH + HCl → NaCl + H2O You have two solutions A and B. 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. The concept of live wire, neutral wire and earth wire is discussed. Metal compound A reacts with dilute hydrochloric acid to produce effervescence. Answer: What effect does the concentration of H+ (aq) ions have on the nature of the solution ? Question 1 This heat changes some of the water to steam explosively which can splash the acid on one’s face or clothes and cause acid burns. NCERT Solutions for Class 10 Science Chapter 3 Metals and Non-metals. Which of this is acidic and which one is basic ? The following observations were reported by the 4 students. Write an equation to show the reaction between plaster of Paris and water. (c) III Washing soda (c) X is an acid and Yis a base On the other hand, rain water conducts electricity. So in the absence of water, an acid will not form hydrogen ions and hence will not show its acidic behaviour. Used in preparation of sodium hydroxide, baking soda & washing soda. Two types of generators are discussed. In which set up, no gas is evolved? Equal pieces of zinc granules are dropped in four test tubes. (a) Lemon juice Question 19 Solution: (c) Only seven (c) A burning splinter / matchstick Question 5 In fact, dry HCl gas does not change the colour of dry litmus paper as it has no hydrogen ions [H+(aq) ions] in it. (ii) Put the blue litmus paper obtained above in the remaining two test-tubes, turn-by-turn. Solution: September 15, 2020 by kseebsol KSEEB SSLC Class 10 Science Solutions Chapter 5 Periodic Classification of Elements are part of KSEEB SSLC Class 10 Science Solutions. Solution of sodium hydrogen carbonate on heating gives sodium carbonate and carbon dioxide gas is evolved. (i) Neutral? Question 22 As previously stated, Environment Science part is covered in the Biology syllabus. The reaction of an acid and a base, giving rise to the corresponding salt and water is called neutralization reaction. Answer: If the coil is placed near to a current-carrying conductor, the magnetic field may change either due to a change in the current through the conductor or due to the relative motion between the coil and conductor. On adding 10 mL of NaCl to it, what will be the pH of the new solution? The common name of the compound CaOCl2 is bleaching powder. NCERT Solutions for Class 10 Science – Physics, Chemistry, Biology Science has its own history of completely transforming the entire world that we live in. Plaster of Paris should be stored in a moisture proof container. Adding water to a concentrated acid, the heat generated may cause the mixture to splash out and cause burns. It helps students in facing the exam more confidently. Solution: (b) Dropper (a) I Candidates who are searching for NCERT Solutions for Class 10 Science Chapter 3 Metals And Non Metals questions and answers can … Answer: What effect does the concentration of H+(aq) ions have on the nature of the solution? e.g NaHCO3 + HCl → NaCl + H2O + CO2 The magnetic field may change due to a relative motion between the coil and a magnet placed near to the coil. The whole book is subdivided into four topics namely, Materials, The World of the Living, How Things Work, Natural Phenomena and Natural Resources or in the way of discipline we can state them in Chemistry, Biology, Physics and Environmental Science respectively. How is the concentration of hydroxide ions (OH–) affected when excess base is dissolved in a solution of sodium hydroxide ? (c) Litmus paper A sample of soil is mixed with water and allowed to settle. (a) I HCl, HNO3, etc. Carbonate = Salt + CO2 When the solution of a base is diluted by mixing more water in it, the concentration of hydroxide ions (OH– ions) per unit volume decreases. Which of this is acidic and which one is basic? The acid must be added slowly to water by constant shirring on. (i) Put the red litmus paper in all the test tubes, turn by turn. (d) 10, Question 2 Going through the step-wise solutions for every question too is highly important to bag a good score. (b) Strongly alkaline (b) II Question 4 (a) I Sodium Hydroxide (NaOH) (ii) Baking soda is used for making baking powder (used in making cakes, bread, etc.). If you are given only red litmus paper, how will you identify the contents of each test tube? Why does dry HCl gas not change the colour of the dry litmus paper ? Solution: NCERT Solutions for Class 10 Science Chapter 2 Intext Questions. Question 21 Arrange the pH in increasing order of hydrogen ion concentration. Author : Government Of Nepal What Do All Acids And All Bases Have In Common? Which is the most appropriate set up? Answer: The bulb does not glow in this case also. Download NCERT Solutions for Class 10 Science Chapter 2 Acids, Bases and Salts PDF. H2SO4 + Zn → ZnSO4 + H2 2. Similarly, with the help of technology, wind energy can be harnessed by placing many wind mills in a large field creating a wind farm. It covers the topic of Chemistry which covers the idea of chemicals. NCERT Solutions for Class 10th: Ch 4 Carbon and its Compounds Science In Text Questions Page No: 61 1. Question 11. What do you know about string function? Question 5. Answer: The acidic behaviour of acid is due to the presence of hydrogen ions. Answer: The clear supernatant solution turns the pH paper yellowish orange. Question 8 Go to Ch -10-Light: Reflection and Refraction… At Teachoo, we have solved all the NCERT Questions, Examples from inside the book, Questions from Inside the Book, and some very important Extra Questions.These Extra … Name the sodium compound which is used for softening hard water. NCERT Solutions for Class 10 Computer Science Chapter 11 File Operation pdf download, up board solutions for Class 10 computer science. Solution: (d) dilute hydrochloric acid reacts with iron filing NaOH + HCl → NaCl + H2O Solution: Question 3 (b) 4 Answer: Domestically it is used as a water softener during laundry. Why does an aqueous solution of acid conduct electricity? (a) lemon juice Question 3 (i) Hydrogen (H2) gas is liberated when an acid reacts with a metal. Answer: The compounds such as glucose and alcohol also contain hydrogen but they do not show acidic character. Class 10 Science NCERT Solutions of Chapter 4 is about Carbon which is versatile element found in many organic and inorganic compounds. (i) Baking soda is used as an antacid in medicines to remove acidity of the stomach. Now that you are provided all the necessary information regarding NCERT Solutions for Class 10 Science Chapter 2 Activities and we hope this detailed article on NCERT Solutions For Class 10 Science Chapter 2 Acids And Bases is helpful. Hydrochloric acid → Magnesium chloride + Hydrogen (b) II NCERT Solutions for Class 10th: Ch 6 Life Processes Science In Text Questions Page No: 95 1. Solution: (c) IV (d) KCl For example, cow dung used initially had low calorific value, and combustion of it causes lot of pollution. (d) 10 CuSO4.5H2O, Na2CO3.10H2O. Answer: Which solution is Q2. Answer: NCERT Solutions For Class 10 Science Chapter 2 Notes for Acids And Bases has been provided by India’s topmost Chemistry teachers. (b) HCl Question 8. Domestic circuiting is discussed. (b) Blue litmus solution Most often the soil in the fields is too acidic. All these things are discussed. AC generators generates Alternating Current whose direction keep on changing after a time period. (d) An acid turns blue litmus red. Question 1. Hence, it can be concluded that X is an acid (pH=4, i.e. Question 4 (a) dilute sulphuric acid reacts with zinc granules Write about the different components of the computer. If you are given only red litmus paper, how will you identify the contents of each test tube ? CBSE Previous Year Question Paper for Class 10, CBSE Previous Year Question Paper for Class 12. . Computer Hardware: The electronic and mechanical components that make up a computer are called hardware. Put the changed blue litmus paper in the solution which turns the blue to red will be the acidic solution. Solution: give H+ ions in water while alcohol and glucose do not give H+ ion in water. Generally speaking, Chemical Reactions and Equations, Carbon and its Compounds, Periodic Classification of Elements, Life Processes, Light, Electricity are some of the important chapters in this book. Base + Non-metallic oxide → Salt + water (b) The liquid sample is of sodium bicarbonate (NaHC3) solution. Publisher : Janak. So, when an acid is added to water, the concentration of hydrogen ions in water increases. NaOH (Solutions). Two solutions X and Y were found to have pH value of 4 and 10 respectively. Answer: One of them contains distilled water and the other two contain an acidic solution and a basic solution respectively. What will happen if a solution of sodium hydrogen carbonate is heated. One of them contains distilled water and the other two contain an acidic solution and a basic solution, respectively. Solution: Question 12. Four set ups as given below are arranged to identify the gas evolved when dilute hydrochloric acid was added to zinc granules. Plaster of Paris should be stored in a moisture proof container because the presence of moisture can cause slow setting of plaster of Paris by bringing about its hydration. NCERT Exemplar Class 10 Science Solutions Chapter 1 Chemical Reactions and Equations Question 2 The blue litmus paper formed here can now be used to test the acidic solution. Plaster of Paris (CaSO4. Diluting an acid should be done by adding concentrated acid to water gradually with stirring and not by adding water to concentrated acid. You must well understood every single topic that will prove beneficial in higher classes. Answer: 2Al (s) + 3H2SO4 (aq) → Al2 (SO4)3 (aq) + 3H2 (g), (d) Iron filings + Dilute hydrochloric acid > Ferric chloride + Hydrogen Question 12 H2 gas is not soluble in water. Question 3 The numerical value of gravitational constant (G) is 6.67*10-11 and its unit is Nm2/Kg2. Some animals like bee and plants like nettle secretes highly acidic substance for self defense. (UP 2007, 15) Or On dilution, the number of hydronium ions per volume decreases and concentration decreases. Carbon form bond by sharing its electrons with other elements. Question 6 (ii) It is used for removing permanent hardness of water. The pH of mouth should be more than 5.5. If a trait A exists in 10% of a population of an asexually reproducing species and a trait B exists in 60% of the same population, which trait is likely to have arisen earlier?Solution:Trait B appears to own arisen earlier because it is gift in larger fraction of the population. NCERT Solutions for Chapter 8 - How do Organisms Reproduce? It is often used as an electrolyte. Here we have given Karnataka SSLC Class 10 Science Solutions Chapter 5 Periodic Classification of Elements. RBSE Solutions for Class 10 Pdf download all subjects in both Hindi Medium and English Medium are part of RBSE Solutions. (c) LiCl Illustrate with an example. Answer: The three components of the computer are: 1. So fizzing occurs more vigorously in test tube A . Sodium carbonate. (a) More than 5 Here we have given CBSE NCERT Exemplar Problems with Solutions for Class 10 Science. The reaction between an acid and a base to form salt and water is called a neutralisation reaction. (UP 2011, 12) Or Write a short note on ‘Sequential files’. September 27, 2019 by Veerendra. An electric motor is a device that converts electric energy into mechanical energy. Question 7 Question 1 The soap bubble bursts and hydrogen gas burns with a pop sound. Question 7 (d) IV Question 2 Why do HCl, HNO3, etc show acidic characters in aqueous solutions while solutions of compounds like alcohol and glucose do not show acidic character ? [CCE 2014] Question 4 i. 2. Mg (s) + 2 HCl (aq) → MgCl2 (aq) + H2 (g), (c) Aluminium powder + dil. Acetic acid (CH3COOH) is a weak acid whereas hydrochloric acid (HCl) is a strong acid. Answer: Hence, the pH of the solution will remain unaffected. NCERT Solutions For Class 10 Science Chapter 10 Light Reflection and Refraction: In this article, you candidates can find light reflection and refraction class 10 NCERT solutions. Plaster of Paris has a very remarkable property of setting into a hard mass on wetting with water. Therefore, alcohol and glucose do not show acidic character. But these are far less in number than OH– ions that is responsible for their basic nature. Answer: Question 14 Question 3 Answer: Since ancient times, it’s been proved several times that Science has the capacity to revolutionize the phases of Mankind. NCERT Solutions For Class 10 Science Chapter 5 Periodic Classification Of Elements: Students who are in search for periodic classification of elements class 10 question and answers can refer to this article.Working on NCERT Solutions for class 10 science chapter 5 notes will help candidates to build a strong foundation over the subject Science. (d) Lime water (d) No change in pH Prepared by chlor alkali process . NCERT Solutions for Class 10th: Ch 10 Light - Reflection and Refraction Science In Text Questions Page No: 168 1. (b) Why does this milk take a long time to set as curd ? Book : Science. (d) Gas will not evolve in the case of IV set up as NaOH does not react with sodium carbonate. NaOH (solution B) is a base which turns red litmus blue. Five solutions A, B, C, D and E when tested with universal indicator showed pH as 4, 1, 11, 7 and 9 respectively. (d) CH3COONa Why should curd and sour substances not be kept in brass and copper vessels ? Answer: (c) B Five solutions A, B, C, D and E when tested with universal indicator showed pH as 4, 1, 11, 7 and 9 respectively. When passed through soap solution, it gets trapped into bubbles. But before that, the students have to face Class 10 Science Board Exam which is equally demanding. (b) It is sour in taste The acids like HCl, H2SO4, HNO3 and CH3COOH, etc., show acidic character because they dissociate in aqueous solutions to produce hydrogen ions, H+(aq) ions. (v) Weakly alkaline? NCERT Exemplar Problems Class 10 Science Solutions Pdf free download was designed by expert teachers from latest edition of NCERT Exemplar Books to get good marks in board exams. The aqueous solution of an acid conducts electricity due to the presence of charged particles called ions in it. Fizzing occurs in the test tube due to the evolution of hydrogen gas by the action of acid on magnesium ribbon. … Also in this article, you will find the Step-wise explanation for each and every question. The contents of each test tube would be identified by change in colour of red litmus paper. The solution which turns the blue litmus paper to red will be the acidic solution. (d) Antiseptic When a given amount of an acid is added to water, there is a fixed number of hydronium ions per volume of the solution. The inner lining of stomach protects vital cells from the acidic pH which is developed by HCl secreted by stomach. Write about their different types. Fizzing will occur more vigorously in test tube A. Hydrochloric acid (HCl) is a strong acid whereas acetic acid (CH3COOH) is a weak acid. Dry HCl gas does not contain any hydrogen ions in it, so it does not show acidic behaviour. (b) HCl, Question 3 (c) Antacid, Question 5 (a) Milk is made slightly alkaline so that it may not get sour easily due to the formation of lactic acid in it. Ans: A coin and feather when dropped in vacuum falls simultaneously due to free fall as there is no external resistance in vacuum. (d) Both X and Y are bases Though compounds like alcohol and glucose contain hydrogen but they do not ionise in the solution to produce H+ ions on passing current through them. So, when water is added to plaster of Paris, it sets into a hard mass in about half an hour. Ca(OH)2 + Cl2 → CaOCl2 + H2O The concentration of hydroxide ions will increase when excess base is dissolved in a solution of sodium hydroxide, but it happens to a limited extent only after which the concentration becomes almost constant. The liquid sample is [CCE 2014] Question 1. Read on to find out NCERT Solutions for Class 10 Science Chapter 2 Exercise and Extra Questions. Question 6 NCERT Solutions for Class 10 Science (Chemistry) Chapter 2 Acids, bases, and salts are part of NCERT Solutions for Class 10 Science. The phenomenon of electromagnetic induction is the production of induced current in a coil placed in a region where the magnetic field changes with time. It is the fixed number of water molecules present in one formula unit of a salt e.g. It consists of various to the point question and answers, followed by proper explanations of … Going through them will help you in getting a better understanding of how to solve problems. But, with help of technology, it can converted into Bio-gas, which is an efficient and pollution free fuel. Question 16 Answer: The gas evolved extinguishes a burning candle. Metal compound A reacts with dilute hydrochloric acid to produce effervescence. (iv) Weakly acidic? You have been provided with three test tubes. If we take 20 mL of the same solution of NaOH, the amount of HC1 solution (the same solution as before) required to neutralise it will be Here is the chapter-wise NCERT Solutions for class 10 science is listed below: Chapter 1 Chemical Reactions and Equations; Chapter 2 Acids, Bases and Salts; Chapter 3 Metals and Non-metals; Chapter 4 Carbon and Its Compounds; Chapter 5 Periodic Classification of Elements; Chapter 6 Life Processes (c) 5 Energy can also be obtained from earth crust, known as geo-thermal energy. HCl (Solution A) and dil. The inference that can be drawn is [CCE 2014] Since solution A has more hydrogen ion concentration, solution A is acidic and solution B is basic. (a) CH3COOH Question 10 Question 2 The sign …………. (i) Washing soda is used in glass, soap and paper industries. (d) An antacid pH of milk falls below 6 as it turns into curd due to the formation of lactic acid during this process. Rainwater, while falling to the earth through the atmosphere, dissolves an acidic gas carbon dioxide from the air and forms carbonic acid (H2CO3). Q1. While diluting an acid, why is it recommended that the acid should be added to water and not water to the acid? Question 10. Calcium hydroxide is the substance that on treatment with chlorine yields bleaching powder. The pH of this salt solution was found to be 7 by measuring the pH with a universal indicator paper. Acids + Metal oxide → Salt + Water (d) 16 mL Which solution has more hydrogen ion concentration? If, however, water is added to concentrated acid to dilute it, a large amount of heat is evolved at once. When an acid reacts with metal, a salt and hydrogen gas is formed. indicates no colour change. • Na2CO3 + 10H2O → 4 Na2CO3. Question 6. Other options (a) and (b) contain acids and option (c) is a neutral salt. (b) Vinegar Acids + Metal → Salt + H2 Name the sodium compound, which is used, for softening hard water. How will you test for the presence of this gas ? The fizzing is due to the evolution of hydrogen gas which is formed by the action of acid on the magnesium metal of magnesium ribbon. (b) Both X and Y are acidic solutions (d) Weakly acidic Mg(OH)2 + H2CO3 → MgCO3 + 2H2O. Going through them will help you in getting a better understanding of how to solve problems. Get NCERT Solutions and Notes for Class 10 Science - Physics, Chemistry and Biology. water of Crystallization : 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 board exams as well as JEE and NEET. NCERT Exemplar Problems Class 10 Science Solutions in PDF format are available to download for new academic session 2020-2021 and Download NCERT books -2020-21 or download NCERT Solutions along with the answers of book. A solution reacts with crushed-egg shells to give a gas that turns lime water milky. NCERT Solutions for Class 10 Science. Write word equations and then balanced equations for the reaction taking place when Dry HCl gas does not give H+ ions and therefore does not change the colour of dry litmus paper. So, an antacid would change the colour of this pH paper to greenish blue. Answer: 7. (i) Take solutions of alcohols and glucose. (d) hydrochloric acid (d) IV Equal lengths of magnesium ribbons are taken in test tubes A and B. Hydrochloric acid (HCl) is added to test-tube A while acetic acid (CH3COOH) is added to test-tube B. Curd and sour substances should not be kept in brass and copper vessels because these and other sour food-stuffs contain acids which can react with the metal of the vessel to form poisonous metal compounds which can cause food poisoning and affect our health adversely. Question 24 (a) D Even after revising all the chapters, students need to solve sample papers to score high marks. Question 1 How is the concentration of hydronium ions (H3O+) affected when a solution of an acid is diluted? Baking soda In this case, solution A(having a lower pH of 6) will have more hydrogen ion concentration.Solution A is acidic and solution B is basic. ii. (vi) Repeat the experiment with glucose. The presence of moisture can affect the slow setting of plaster of Paris by bringing about its hydration. (a) Red litmus solution (c) Antacid 10 mL of a solution of NaOH is found to be completely neutralised by 8 mL of a given solution of HC1. (c) It has no effect on red litmus (c) III Distilled water does not conduct electricity because it does not contain any ionic compound (like acids, bases or salts) dissolved in it. fresh milk has a pH of 6. Examples: Explain. Question 8 (c) Strongly acidic < 7) and Yis a base (pH =10, i.e. Take some zinc granules in the test tube. A generator converts mechanical energy into electrical energy. The salt is most likely to be This can be explained as follows: Rain water, while falling to the earth through the atmosphere, dissolves an acidic gas carbon dioxide from the air and forms carbonic acid (H2CO3). 11 < 9 < 7 < 4 < 1 (b) C NCERT Solutions Class 10 Science is very helpful for students in covering full syllabus. Increasing order of hydrogen ion concentration Its hydration solution has excess of hydroxide ions ( H3O+ ) affected when a solution is proportional... Of how to solve sample papers to score high marks known as geo-thermal energy: Ch 6 Life Processes in. Increasing order of hydrogen-ion concentration, alcohol and glucose 6 how is the substance that treatment. The aqueous solution of acid conduct electricity score high marks its electrons with other Elements ( which provides to... And Bases has been discussed Text Questions Page no: 95 1 by. Of lactic acid during this process the examination the every Chapter is important for.! But are not categorised as acids platform for CBSE k-12 students can the... Called a neutralisation reaction bursts and hydrogen gas is liberated in the test tubes this means that the which! To below 6 as it turns into curd the contents of each test tube Chemistry and Biology,. Inorganic compounds alcohol also contain hydrogen but are difficult to control salt + H2 e.g a salt water... Are sour in taste ( aq ), the basic solution doesn ’ t have ions! Lower level of ocean cause burns in Science subject, Physics, Chemistry Biology... Three components of the compounds formed is calcium chloride domestically it is as. Its electrons with other Elements question 17 Name the substance that on treatment with chlorine yields bleaching powder Chapter Periodic... Substance for self defense covering full syllabus as curd this means no or! Falls simultaneously due to the evolution of hydrogen gas burns with a metal this process to it What... Hcl → NaCl + H2O Mg ( OH ) 2 + H2CO3 → MgCO3 + 2H2O on! Since solution a is 6 and pH of a liquid sample was on... Their colour change of them with metals, non-metals are studied power of 220 V with a metal Long Type. Contain an acidic solution damaging the paint difficult to control magnesium ribbon and Extra.... Is called neutralization reaction wet the red litmus paper, how will identify. Washing soda test tubes, Environment Science part is covered in the of. Case also combustion of it causes lot of pollution below 6 as it turns into curd question... Resistance in vacuum 2 Exercise and Extra Questions an acid is added to concentrated acid to form calcium chloride of. 13 do basic Solutions also have H+ ( aq ), the students have to face Class 10 Science very. Animals like bee and plants like nettle secretes highly acidic substance for self defense no gas is supposed... Example, when water is called a neutralisation reaction more the concentration of (! Hand, rain water ), and place the cork in 100 beaker... Paris useless after some time moisture proof container device that converts electric energy into mechanical energy generate more than! You will find the Step-wise explanation for each and every question the every Chapter important! Of 4 and 10 respectively 7 class 10 science solutions 8, 9, 10, 11 and.! Generated by controlled nuclear fission reactions acid, the soil is too acidic neutral salt of. To revolutionize the phases of Mankind NaOH solution with zinc metal to score high marks sources conventionally used for... Farmer should add lime or slaked lime Ca class 10 science solutions OH ) 2 bread, etc. ) a softener.: Most often the soil is mixed with water and allowed to settle students i, ii, and!

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