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. 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. Write the chemical equation of its preparation. (a) When a piece of marble (CaCO3) is dropped in dil HCl, CO2 gas will be evolved which turns lime water milky. 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. One can dilute concentrated acid by adding concentrated acid slowly in water with 5.What is the minimum & maximum value of PH meter? Answer: We can dilute the concentrated acid but need to take certain precautions as Question 4. Note : it is interesting to note that all bases are not alkalis but all alkalis are bases. Learn Insta try to provide online science tutoring for you. Name the plant & its division for which litmus can be extracted? (b) HCl Example, Na. Students can solve NCERT Class 10 Science Acids Bases and Salts Multiple Choice Questions with Answers to know their preparation level. Tomato contains oxalic acid. Reaction of acids with metal Oxides - Metal oxide is a chemical compound that contains oxygen and one metal in its chemical formula. How is the concentration of hydronium (H3O+) ions affected when a solution of an acid is diluted? Ph scale consist of scale ranging from 0 to 14 . Q9. (d) KCl, Q3. Ans. NCERT Extra Questions for Class 10 Science Chapter 2 Acids, Bases and Salts with Answers will help to score more marks in your CBSE Board Exams. Preparation : by Solvay’s process Hope given HOTS Questions for Class 10 Science Chapter 2 Acids, Bases and Salts are helpful to complete your science homework. Metal oxides are Basic while non-metal oxides are acidic. Bring a burning candle near hydrogen gas-filled bubble. It is formed when strong acid react with weak base. When the Ph of milk becomes lesser than its normal Ph i.e. Free PDF Download of CBSE Class 10 Science Chapter 2 Acids Bases and Salts Multiple Choice Questions with Answers. The pH Scale Chapter 10 Acids, Bases and Salts 25. It is used as a cleansing agent for domestic purposes. The reaction is highly exothermic, therefore, constant cooling should be done. Mg +2HCL-->MgCL2+H2 This reaction is regarded as neutralization reaction as salt formed is neither acidic nor basic its neutral, 5. //2FeCL3+3H2. Sour taste is the most common characteristic of acid. If the liquid of test tube B turns that red litmus paper to blue again, it shows that it is a base. – Act as electrolytes in Solution. 1. Cl2 gas is given off at the anode and H2 gas at the cathode while sodium hydroxide solution is formed near the cathode. Solution B will be basic in nature as its pH value is 8. Classification of acids on the basis of water content. (b) 8 mL If we talk about strength, it means the amount of hydrogen ions given out when acid is dissolved in water. Answer: The water molecules, which form part of the structure of a crystal, are called water of crystallization. (a) Write the name given to bases that are highly soluble in water? (a) What is the importance of pH in everyday life?  (2017 OD) 21. (d) 16 mL, Q4. Solution B gives red colour when a drop of methyl orange is added to it. One can be relieved from the sting of beetle by rubbing it with the leef of dock plant. 3. Q14. Name the substance and write its chemical formula. 1. in tomato, oxalic acid is present , in apple, malic acid and in lemon, we have citric acid and so many other acids are present in different organic substances. Explain.  (2012) Organic Acids are obtained from plants and animals  or we can say they are present in organic matter. What change would be observed in lime water? When electricity is passed through a concentrated solution of sodium chloride (called brine), it decomposes to form sodium hydroxide, chlorine and hydrogen gas.   Na2CO3.10H2O  → Na2CO3+10H2O                                            Question 4. Chemical properties of acids: Question 5. HCL+NaOH→NaCl+H2O 9. Which of the two solutions has more hydrogen ion concentration and which one is more acidic? With examples.  (2014) Artificial Indicators: Phenolphthalein, methyl orange uses of Baking Soda – React with several metals releasing Hydrogen gas. What is a neutralisation reaction? Formula : CaoCL2 Preparation : by solvays process Classification on the basis of strength, Strong Bases: That completely dissociates in water to give hydroxide ions. (ii) Baking powder is a mixture of baking soda and a mild edible acid such as tartaric acid. 4. Classification of acids on the basis of strength Solution with pH=11,12,13,14 are strong base. pH>7. How do we come to know that milk has turned sour? (f) 11<9<7<4<1. (c) strongly acidic? Question 2. a) Acid is sour in taste. Answer: 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. Mark them as ‘A’ and ‘B’. 18.Name the acid present in lemon, tomato & curd? Lime water in each case will turn milky due to the production of CO2 gas in each of the test tubes. (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. 1. Ans. Q8. pH 7 is neutral. Example -  HCl + NaOH → NaCl + H2O. Use: Washing soda is used for softening hard water. In aqueous state when current is passed they dissociate into ions . Ans. (c) Why does bee sting cause pain and irritation? To which category acetic acid belongs? If you have any doubts, please comment below. Q1. Oct 12, 2020 - Concept - Acids, Bases & Salts Class 10 Notes | EduRev is made by best teachers of Class 10. In Tooth Decay: Tooth Decay Starts When Ph Of Mouth Falls Below 5.5. Acid turns blue litmus paper red. 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. The solution contains (c) 1 (a) Antibiotic constantly absorbed by water. (b) Solution A gives pink colour when a drop of phenolphthalein indicator is added to it. All bases act as electrolyte in aqueous states i.e. In the crucial hour of Class 10 Board exams, Acids, Bases and Salts Class 10 Notes aims at increasing the self-confidence of the students by offering a simple way to study or revise the chapter. Physical properties Fresh milk has a pH of 6. (d) 4 Bases act as electrolyte because they produce ions in solutions. Write the chemical name of Plaster of Paris. 10 mL of a solution of NaOH is found to be completely neutralised by 8 mL of a given solution of HCl. 7. Inorganic Acids are those that are obtained from minerals present in earth. Weak Bases: That do not completely dissociates in water to give hydroxide ions. Question 3. 2. … The pH of solution A is 6 and pH of solution B is 8. Is a chemical equation: name the plant & its division for which litmus can be?. 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