project on acids, bases and salts for class 10

Mention its one use.  (2015) HCL+NaOH→NaCl+H2O, The salts are formed as a result of neutralization reaction as both acid and base neutralize each others effect. Some fruits like mango, lemon, raw grapes, orange, etc., have a sour taste due to the presence of: MCQ Questions for Class 10 Science with Answers was Prepared Based on Latest Exam Pattern. A : Neutralization reaction : a reaction in which two compounds react to form neutral substance . 10-12:                       Moderately Basic HCL+NaOH----NaCl+H2O In this page, we are providing Acids, Bases and Salts Class 10 Extra Questions and Answers Science Chapter 2 pdf download. Acids, Bases and Salts Class 10 Questions and Answers. Ans . ACID,BASES AND SALT for Class 10th....CREATED TO PIYUSH BHANDARI 1. In this chapter, various chemical properties of acids, bases and salts and … Ans.Slaked lime i.e. (e) 9 Hope given HOTS Questions for Class 10 Science Chapter 2 Acids, Bases and Salts are helpful to complete your science homework. Question 6. A milkman adds a very small amount of baking soda to fresh milk. (b) How are sodium hydroxide and Cl2 (Chlorine) gas produced from common salt. What change would be observed in lime water? 4. A :Distilled water not conduct electricity, whereas rain water does because distilled water is pure form of water so it does not ionize whereas rain  water contains impurities that makes it good conductor of electricity. (iii) Cone, of H3O+ ion is affected when a solution of an acid is diluted. Turmeric contains a yellow dye, which turns red in basic solutions when soap is scrubbed on a stain of curry on a white cloth. 16.Out of phosphoric & carbonic acid which is weak acid? Give reason for your answer. Depending upon source  from which they are obtained. (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. Rubbing of baking soda on the sting area gives relief. pH of solution B = 5 nor basic its neutral. (i) as an antacid (b) (i) Being alkaline, sodium hydrogen carbonate (baking soda) neutralises the excess acid present in the stomach and relieves indigestion. Acid Base and Salt. Question 6. Two solutions A and B have pH 3 and 5 respectively. We can dilute the concentrated acid but need to take certain precautions as Answer: Answer: Reaction involved : Solution with pH=0,1,2,3 are strong acids. Basicity is defined as “Number of ions produced when acid is dissolved in water”. window.__mirage2 = {petok:"2bb90bd34a9c3841e634d59cdc7e5191b402531b-1608327502-1800"}; CBSE Class 10 Science Chapter 2 Notes Acids Bases and Salts Acids Bases and Salts Class 10 Notes Understanding the Lesson. of salt content. You are provided with three test tubes C, A and B which contain distilled water, acidic solution and basic solution. Learn Insta try to provide online science tutoring for you. It turns lime water milky. (b) Why is HCl a stronger acid than acetic acid? How one can be relieved from the sting of beetle? Latest Entrance Exams, Admission info. Students who are in Class 10 or preparing for any exam which is based on Class 10 Science can refer NCERT Book for their preparation. Action  of air : Na2CO3.10H2O  → Na2CO3 H2O.+9H2O Q8. Tooth decay starts at a Ph of below 5.5 ; excess of acid reacts with enamel (Ca3Po4) & corrodes it. 2NaCl (aq) + 2H2O (l) → 2NaOH (aq) + Cl2(g) + H2 (g) If you are given blue litmus paper only, how will you identify the contents of each test tube?  (2015) Biological Importance: Our Body Works Within 7-7.8 Ph. So, it prevents the reaction from becoming violent. Cl2 gas is given off at the anode and H2 gas at the cathode while sodium hydroxide solution is formed near the cathode. Explain the phenomenon involved. A: Acids not show acidic behaviour in the absence of water because in absence of water they do not get ionized to produce hydrogen ions ? Ph scale consist of scale ranging from 0 to 14 . Answer: How is the concentration of hydronium (H3O+) ions affected when a solution of an acid is diluted? Describe an Activity to prove it. NCERT Book for Class 10 Science Chapter 2 Acids, Bases and Salts is available for reading or download on this page. A: Fresh milk’s Ph decreases as the bacteria in milk starts converting lactose into lactic acid. 1. Answer: Question 8. They are corrosive in nature, Some physical properties of bases are as follows - Ans.Sulphuric acid is called acid because when dissolved in water, it dissociates to give H3O+ ions. Give an example.  (2012, 2014) Effect on methyl orange: original color (orange) Stomach acts in slightly acidic medium while small intestine digests the food in slightly alkaline medium. When milk changes into curd, its pH value will decrease because curd contains lactic acid (pH < 6 of acids). Acids, Bases and Salts | Class 10 | Ep -2 ( Part 1) | Tabahi Tenthies Topics Covered: 1). (b) State the chemical property in each case on which the following uses of baking soda are based: Physical properties Oct 12, 2020 - Concept - Acids, Bases & Salts Class 10 Notes | EduRev is made by best teachers of Class 10. (b) Solution A gives pink colour when a drop of phenolphthalein indicator is added, therefore A is a base. Answer: When sodium carbonate is dissolved in water, it gets hydrolysed to some extent and forms sodium hydroxide and carbonic acid. Bring a burning candle near hydrogen gas-filled bubble. Complete – NaOH + Al → NaAlO2 + ___, 30. CBSE Maths notes, CBSE physics notes, CBSE chemistry notes. Thus, A will have pH more than 7 because pH value of. In Tooth Decay: Tooth Decay Starts When Ph Of Mouth Falls Below 5.5. Like we individuals have certain kind of nature, likewise, every chemical substance that we come across has some nature. (a) (i) Living organisms can survive only in a narrow range of pH change. To which category acetic acid belongs? The pH of solution A is 6 and pH of solution B is 8. Name the reactant and the product and mention one use of the product. Your No1 source for Bacteria present in the mouth produce acids by the degradation of sugar and food particles remaining in the mouth after eating. : PH =-LOG(H+) Salts are formed when acid and base react with each other. These dissociate in their aqueous solution to form their constituent ions, as given by the following examples. (a) The blue colour of crystals of a substance changed on heating in a closed test tube but the colour was regained after sometime on cooling. Test tube ‘A’ Na2CO3 (s) + 2HCl (aq) → 2NaCl (aq) + CO2 (g) + H2O (l) Acidic rain water when flows into the rivers, it lowers the pH value of river water and makes the survival of acquatic life in such river water difficult. Strength of acid and base is expressed in terms of Ph. Use: Plaster of Paris is used in hospitals for setting fractured bones in the right position to ensure correct healing. (c) Why does bee sting cause pain and irritation? k.setAttribute("data-push", "1"); Test for hydrogen gas: Take about 5 ml of dilute sulphuric acid in a test tube and add a few pieces of zinc granules to it. Q12. i.e. (a) Define a universal indicator. Answer: (f) 11<9<7<4<1. Answer: Effect on Base: Turns red litmus blue 3. There actually, A: Acids not show acidic behaviour in the absence of water because in absence of water they do not get ionized to produce hydrogen ions, Chapter 1 Chemical Reactions and Equations Class 10, Chapter 2 Acids, Bases and Salts Class 10 Science Chapter, Chapter 3 Metals and non metals Class 10 Science Chapter, Chapter 4 Carbon and its Compounds Class 10 Science Chapter, Chapter 5 Periodic Classification of Elements Class 10 Science Chapter, Chapter 6 Life Processes Class 10 Science Chapter, Chapter 7 Control and Coordination Class 10 Science Chapter, Chapter 8 Reproduction Class 10 Science Chapter, Chapter 9 Heredity and Evolution Class 10 Science Chapter, Chapter 10 Light - Reflection and Refraction Class 10 Science Chapter, Chapter 11 The Human Eye and the Colourful World Class 10 Science Chapter, Chapter 12 Electricity Class 10 Science Chapter, Chapter 13 Magnetic Effects of Electric Current Class 10 Science Chapter, Chapter 14 Sources of Energy Class 10 Science Chapter, Chapter 15 Our Environment Class 10 Science Chapter, Chapter 16 Sustainable Management of Natural Resources Class 10 Science, CBSE Class 10 Science Syllabus 2019-2020 Session, Tips to score 95% in class 10 Science paper, Learn English Grammar in Hindi ( step by step) - Learn English Online Videos, English Writing Skills - Class 10, 12 Letter Formats, Email etc, Entrance Exams for Arts students after Graduation, List of Entrance Exams conducted by IGNOU, There actually exists the equilibrium between dissociated ions and undissociated, Effect Of Acid On Vanilla Extract: same smell, Effect Of Base On Vanilla Extract:smell changes, Effect Of Acid On Onion Extract:same smell, Effect Of Base On Onion Extract: smell changes, Used in detergents as it has cleansing properties, Reaction with water : when used it has to mixed with water and following reaction occurs-. Question 2. Chemical properties of acids: Question 5. (c) dilute sulphuric acid reacts with aluminium powder. (b) Tooth decay starts when the pH of the mouth is lower than 5.5. As the acid is strong, therefore, strong character is retained in the salt that is why it comes out to be acidic 1.Action with Indicators: They turn red litmus blue Curry contains turmeric which acts as an acid-base indicator. One can be relieved from the sting of beetle by rubbing it with the leef of dock plant. 1. When soap is scrubbed on a stain of curry on a white cloth, why does it become reddish-brown, and turns yellow again when the cloth is washed with plenty of water?  (2015 ) The mixture contains more of hydroxide ions than hydrogen ions, so it is basic in nature. Natural Acids:These are obtained from natural sources, such as fruit… (c) 5 a) Acid is sour in taste. Question 3. acid + base→salt + water Reaction involved : Produce [H+] in H 2 O; Sour taste; Turns blue litmus red; Acts as electrolyte in solution; Chemical Properties Of Acids Acids + Metal → Salt + H 2 e.g. (b) Analgesic Ans. → Litmus solution is a … The term acid is derived from a Latin word ‘acidus’ or ‘acere’, which means sour. The first phase is an introduction to the concepts of acids, bases and salts. Question 4. → The sour and bitter tastes of food are due to acids and bases are present in them. Base:  from orange to yellow Ans. Litmus (purple) , phenolphthalein (colourless). Pass the gas produced in each case through lime water as shown in the figure. Q13. A: (a) 7 Curd contains Lactic acid. This document is highly rated by Class 10 students and has been viewed 2060 times. Question 4. Metal oxides are Basic while non-metal oxides are acidic. (a) Antibiotic (b) dilute hydrochloric acid reacts with magnesium ribbon. Preparation : by solvays process 0-2:                            Strong Acid Question 3. Organic Acids are obtained from plants and animals  or we can say they are present in organic matter. What is a neutralisation reaction? The pH Scale Chapter 10 Acids, Bases and Salts … Acids, Bases and Salts class 10 2). (c) When a honey bee stings a person, it injects an acidic liquid into the skin which causes immense pain and irritation. It is Formed When Weak Or Strong Acid And Base React With Each other. For example, copper oxide (CuO), sodium oxide (Na 2 O), magnesium oxide (MgO).. Acids give water along with respective salt when they react with a metal oxide. 1. Solution A is more acidic as solution A has more hydrogen ion concentration, because the pH of a solution is inversely proportional to the concentration of hydrogen ions in it. (c) Why it is called a basic salt? Write balanced chemical equations for both the changes observed. The dehydration of copper sulphate crystals is a reversible process.   Na2CO3.10H2O  → Na2CO3+10H2O                                            The reaction is highly exothermic, therefore, constant cooling should be done. These acids 10 mL of a solution of NaOH is found to be completely neutralised by 8 mL of a given solution of HCl. This chapter dives further concerning these three, as students have learned about them in brief earlier. NCERT Exemplar Solutions. (c) strongly acidic? It is formed when strong acid react with weak base. (ii) The aqueous solutions of glucose and alcohol do not show acidic character because their hydrogen does not separate out as hydrogen ions [H+ (aq) ions] on dissolving in water. totally dissociate and leave no dissociated molecule of acid. Weak Bases: That do not completely dissociates in water to give hydroxide ions. These bases  totally dissociates and leave no dissociated molecule of base, Example: Hydroxides of all reactive metals. Base: Turns pink Take two test tubes. 2. Write word equations and then balanced equations for the reaction taking place when – (a) dilute sulphuric acid reacts with zinc granules. Ph and its biological importance, indicators. Introduction to Acids, Bases and Salts CBSE Class 10 Chemistry | Science Chapter 2 | NCERT Solutions | Umang Vedantu Class 9 and 10. An acid is a substance which gives hydrogen ions or proton (H+) when dissolved in an aqueous solution. Name the substance that is added to sail to remove its acidity? Ans. Mg +2HCL-->MgCL2+H2 (a) NaCl Q11. Write the chemical name of Na2CO3.10H2O and Na2CO3. 25 The lower the pH, the more acidic the solution is. (a) Chemical name of washing soda: Sodium carbonate decahydrate Chemical formula of washing soda: Na2CO3.10H2O, (b) Washing soda is produced by Solvay process by the reaction of ammonical brine with CO2 gas 3) Basic solution. 26.How sting of yellow weeps can be neutralized? (i) The acid is to be added slowly in water to prevent the mixture to be splashed. 2. it is used in baking cakes, etc - in cakes baking powder is added that contains baking soda and tartaric acid. Acetic acid belongs to Organic acid  & is week acid. 1. These notes provide the students with the summary of the chapter, important points to remember and detailed explanation of important concepts and derivations for better understanding. Why does dry HCl gas not change the colour of the dry litmus paper? Five solutions A,B,C,D and E when tested with universal indicator showed pH as 4,1,11,7 and 9, respectively. Answer: Washing soda is produced by Solvay process, by the reaction of ammonical brine with CO2 gas. Efflorescence : “the loss of 9 molecules of crystallization when washing soda is exposed to air “. (a) What is the importance of pH in everyday life?  (2017 OD) (2017 OD) This process is called Chlor-alkali process because the products formed are chlorine and alkali NaOH. Chemicals from common salt; NCERT Solutions for Class 10 Chapter 2 Science Acids bases and salts. How do we come to know that milk has turned sour? b) Acid reacts with base to give salt … Example : NaOH+CH3COOH→CH3COONa+H2O, Neutral Salt 2. (c) Name one salt whose solution has pH more than 7 and one salt whose solution has pH less than 7. – React with several metals releasing Hydrogen gas. All these model solutions have been prepared by the subject experts. Ans. More Than 12:        Strongly Base. //

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