Answer: The Class 10 Science Chapter 2 PDF contains solutions to every question in Class 10 Science Chapter 2. The reaction of an acid and a base, giving rise to the corresponding salt and water is called neutralization reaction. Page 3 of 7. Arrange the pH in increasing order of hydrogen ion concentration. The presence of moisture can affect the slow setting of plaster of Paris by bringing about its hydration. Write a balanced chemical equation for the reaction if one of the compounds formed is calcium chloride. Which gas is usually liberated when an acid reacts with a metal? (ii) Fix two nails on a cork, and place the cork in 100 mL beaker. Class 10 Science Chemistry Chapter 2 Notes. Why do HCl, HNO3, etc show acidic characters in aqueous solutions while solutions of compounds like alcohol and glucose do not show acidic character ? Download NCERT Solutions for Class 10 Science Chapter 2 Acids, Bases and Salts PDF. Used in preparation of sodium hydroxide, baking soda & washing soda. Formic acid: Found in ant sting, nettle sting. Equations and reactions related to each fact are also taken to describe the definition. (c) Strongly acidic ii. A base turns red litmus paper blue. For example Taj Mahal, which is made of marble, is getting damaged because of reaction with acid rain. Question 6. Ca(OH)2 + Cl2 → CaOCl2 + H2O A pH value of less than 7 indicates an acidic solution, while greater than 7 indicates a basic solution. 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. Question 1 Solution: The setting of plaster of Paris is due to the hydration crystals of gypsum, which set to form a hard, solid mass. The chemical equation of this process is as folllow: 2NaCl(aq) + 2H2O(l) → 2NaOH(aq) + Cl2 (g) + H2(g). All Chapters NCERT Solutions for Class 10 Science are available over here in PDF format for free of cost. On adding 10 mL of NaCl to it, what will be the pH of the new solution? NCERT Solutions For Class 10 Science Chapter 2 Notes for Acids And Bases has been provided by India’s topmost Chemistry teachers. H2SO4 + CuO → CuSO4 + H2O, Bases + Metals → Salt + H2 Why? (c) The correct observation is taken by student III because HCl (solution A) is an acid which turns blue litmus red and dil. XRumerTest on The Fight Summary Chapter 6 It so happened; Gunjan on Activity 2.7 NCERT Class 10 Science, Acids, Bases and Salts; Fardeen on Theorem 6.1 NCERT Class 10 Maths Chapter 6 Triangles; Jasmin on A Different Kind of School MCQ; Anonymous on Activity 3.9 NCERT Class 10 Science… It also deals with various types of reactions related to these three forms of chemical compounds. Universal indicator shows different colour over the range of pH value from 1 to 14 for a given solution. Going through the step-wise solutions for every question too is highly important to bag a good score. Explanation of every important term related to Acids and Bases. Following substances are poured in all the four test tubes. These 10th Science Notes are useful for UP Board Students also. (a) I Why should curd and sour substances not be kept in brass and copper vessels ? (b) Why does this milk take a long time to set as curd ? (a) Neutral 10H2O Answer: Sulphuric acid > Aluminium sulphate + Hydrogen (d) Antiseptic BNAT; Classes. When electricity is passed through an aqueous solution of sodium chloride (called brine), it decomposes to form sodium hydroxide. When the concentrated solution of an acid is diluted by mixing water, the concentration of hydronium ions H3O+ per unit volume decreases. Ions are two types: (I) Cation: It carries (+) Positive charge on atom. Illustrate with an example. 0 (zero) value on pH scale indicates highly acidic (strongest acid), 7 (seven) value on pH scale indicates the neutral solution, 14 (fourteen) value on pH scale indicates highly basic (strongest base), Strength of acid, i.e. Balbharati solutions for Science and Technology Part 1 10th Standard SSC Maharashtra State Board chapter 2 (Periodic Classification of Element) include all questions with solution and detail explanation. This is a half video chapter for class 10. NCERT Class 10 Science books offer all the concepts and topics in the simplest and detailed form, therefore, reading NCERT Science Books For Class 10 is essential to clear all the concepts and score good marks in their exams CBSE follows NCERT books. Potassium is an alkali metal thus potassium oxide, potassium hydroxide and potassium carbonate are base. Class 10th Civics textbook is mainly dealt with the … Acid rain causes damage to the historical monuments and other buildings. Answer: (b) dilute hydrochloric acid reacts with magnesium ribbon Sodium is an alkali metal, thus sodium oxide, and sodium hydroxide and sodium carbonate are base. For example: sulphuric acid, hydrochloric acid, nitric acid, phosphoric acid. Question 12. All mineral acids are strong acids except carbonic acid. Lower pH of sour & sweet food can cause tooth decay. Solution: MCQs are important for the CBSE and other boards final exams. A base gives bitter taste. A drop of a liquid sample was put on the pH paper. Besides, the marks scored in the board exam, class 10 will also help students to choose the desired stream for their higher studies. The NCERT Class 10 Science Chapter 2 questions and answers will also cover the importance of pH in everyday life, the pH range of acidic, basic and neutral solution and the wide applications of pH scale. (d) As NaCl is a neutral solution due to its complete ionization in H2O and has pH = 7. CuSO4.5H2O, Na2CO3.10H2O. Do basic solutions also have H+ (aq) ions ? (e) Weakly alkaline NaOH (solution B) is a base which turns red litmus blue. conditions as shown below. Class 10th science chapter 2 is part of unit 1, Chemical Substances - Nature and Behaviours. All bases give (OH–) hydroxide ion with water. Question 7 (c) The gas evolved can be tested as shown in IV set up because to evolve H2 gas delivery tube, should not dip in the acid. (a) I (c) 12 mL Here you can read Chapter 2 … Question 11 (a) Red litmus solution What is a neutralisation reaction ? Some animals like bee and plants like nettle secretes highly acidic substance for self defense. (d) CH3COONa Identify the article which he is not supposed to pick. 2NaOH + Zn → Na2ZnO2 + H2 A sample of soil is mixed with water and allowed to settle. Which of the following statements shows the property of an acid? Vidyakul presents CBSE Class 10 Science Notes Chapter-wise for students who aim for scoring maximum marks in their board exam. (a) Lemon juice Question 10 (a) X is a base and Y is an acid (b) Strong adds like HCl react vigorously with active metals like Zn and form metal salt and evolve H2 gas. Why do acids not show acidic behaviour in the absence of water? Solution: Lactic acid present in it reduces its pH value. Calcium carbonate reacts with dilute hydrochloric acid to form calcium chloride, carbon dioxide and water. 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