Why does dry HCl gas not change the colour of the dry litmus paper ? Acids + Metal oxide → Salt + Water (c) The correct observation is taken by student III because HCl (solution A) is an acid which turns blue litmus red and dil. Question 1 This NCERT Solutions has questions-related to an electric cell, electric bulb, electric circuits, switches, conductors and insulators, examples of conductors and insulators. Fresh milk has a pH of 6. dry slaked lime. How is the concentration of hydronium ions (H3O+) affected when a solution of an acid is diluted? (c) A burning splinter / matchstick Why does dry HCl gas not change the colour of the dry litmus paper? The pH of solution A is 6 and pH of solution B is 8. i.e. Question 1. (ii) Put the blue litmus paper obtained above in the remaining two test-tubes, turn-by-turn. Which gas is usually liberated when an acid reacts with a metal ? 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 (a) 1 When passed through soap solution, it gets trapped into bubbles. Which solution has more hydrogen ion concentration? (b) Strong adds like HCl react vigorously with active metals like Zn and form metal salt and evolve H2 gas. (d) Antiseptic The aqueous solutions of glucose and alcohol do not show acidic character because the hydrogen in them does not separate out as hydrogen ions [H+ (aq) ions] on dissolving in water. Solution: NCERT Solutions for Class 10th: Ch 4 Carbon and its Compounds Science In Text Questions Page No: 61 1. Five solutions A, B, C, D and E when tested with universal indicator showed pH as 4, 1, 11, 7 and 9 respectively. Question 13 The reaction of an acid and a base, giving rise to the corresponding salt and water is called neutralization reaction. Examples: Question 15 On dilution, the number of hydronium ions per volume decreases and concentration decreases. Why does an aqueous solution of acid conduct electricity? Define the principal focus of a concave mirror. 2NaOH + Zn → Na2ZnO2 + H2 Which solution is (c) IV 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. Before getting into the details of NCERT Solutions For Class 10 Science Chapter 2 Acids And Bases, let’s have an overview of topics & subtopics under NCERT Solutions for Class 10 Science Chapter 2 Activities: Free download NCERT Solutions for Class 10 Science Chapter 2 Acids And Bases PDF in Hindi Medium as well as in English Medium for CBSE, Uttarakhand, Bihar, MP Board, Gujarat Board, and UP Board students, who are using NCERT Books based on updated CBSE Syllabus for the session 2019-20. Answer: Diluting an acid should be done by adding concentrated acid to water gradually with stirring and not by adding water to concentrated acid. (a) Na2CO3 It works on the basis of electromagnetic induction. (a) NaCl Four set ups as given below are arranged to identify the gas evolved when dilute hydrochloric acid was added to zinc granules. Question 25 Question 1 The correct observation would be of student (e) Weakly alkaline If the direction of the field and that of the current are mutually perpendicular to each other, then the force acting on the conductor will be perpendicular to both and will be given by Fleming’s left-hand rule. Increasing order of hydrogen ion concentration Solution: NCERT Solutions For Class 10 Science Chapter 2 Notes for Acids And Bases has been provided by India’s topmost Chemistry teachers. Why do HCl, HNO3, etc show acidic characters in aqueous solutions while solutions of compounds like alcohol and glucose do not show acidic character ? fresh milk has a pH of 6. Answer: Question 16 Lower pH of sour & sweet food can cause tooth decay. Solution: NCERT Solutions for Class 10 Science Chapter 12 has Electricity and circuits provide answers and explanations to all the exercise questions provided in the textbook. Carbon form bond by sharing its electrons with other elements. NCERT Solutions for Class 10 Science (Chemistry) Chapter 2 Acids, bases, and salts are part of NCERT Solutions for Class 10 Science. You must well understood every single topic that will prove beneficial in higher classes. A student performed an experiment using zinc granules and sodium carbonate with sodium hydroxide and hydrochloric acid under different Answer: Theses chapters are divided into 5 units. Ca(OH)2 + Cl2 → CaOCl2 + H2O As previously stated, Environment Science part is covered in the Biology syllabus. [CCE 2015 ]. • Na2CO3 + 10H2O → 4 Na2CO3. If you want to score maximum marks in the examination the every chapter is important for you. The acidic behaviour of acids is due to the presence of hydrogen ions, [H+ (aq) ions], in them. Question 6. 1. Electricity generation through magnet is discussed. Solution: The direction of the induced current is given by the Fleming’s right-hand rule. What will happen if a solution of sodium hydro carbonate is heated? Question 1 If yes, why are these basic? Bleaching Powder (CaOCl2): NCERT Solutions For Class 10 Science Chapter … A solution reacts with crushed-egg shells to give a gas that turns lime water milky. The aqueous solution of an acid conducts electricity due to the presence of charged particles called ions in it. Being strong acid, the hydrochloric acid solution contains a much greater amount of hydrogen ions in it due to which the fizzing will occur more vigorously in test tube A (containing hydrochloric acid). Question 9. (d) dilute hydrochloric acid reacts with iron filing Solution: Answer: A salt is dissolved in water. \(\frac{1}{2}\) H2O) Answer: NCERT Solutions for Class 10 Science Chapter 2 Intext Questions. Following substances are poured in all the four test tubes. If yes, then why are these basic ? 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. Answer: A drop of a liquid sample was put on the pH paper. Used for making toys, material for decor action, smooth surfaces. Why do acids not show acidic behaviour in the absence of water ? Question 19 Answer: NCERT Class 10 Science Chapter 5- Periodic Classification of Elements is categorized under Unit Chemical Substances – Nature and behavior. The gas will burn with a pop sound confirming the presence of hydrogen gas. (a) Zinc + dilute sulphuric acid → Zinc sulphate + Hydrogen Answer: How is the concentration of hydroxide ions (OH–) affected when excess base is dissolved in a solution of sodium hydroxide ? The topics which are covered in this chapter are Chemical equation, Balanced chemical equation, implication of a balanced chemical equation, types of chemical reactions: Combination, decomposition, displacement, double … What would be the electron dot structure of carbon dioxide which has the formula CO 2? Distilled water does not conduct electricity because it does not contain any ionic compound (like acids, bases or salts) dissolved in it. 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. (c) 12 mL > 7). All these things are discussed. Answer: The pH of mouth should be more than 5.5. Under what soil condition do you think a farmer would treat the soil of his fields with quick lime (calcium oxide) or slaked lime (calcium hydroxide) or chalk (calcium carbonate) ? (d) III 11 < 9 < 7 < 4 < 1 Answer: (a) D If it develops bubbles, the soil is too acidic. Answer: Question 1 Thus, a farmer should add lime or slaked lime in his fields when the soil is too acidic. Why does an aqueous solution of an acid conduct electricity ? (b) Salts which are completely ionisable in water are said to be neutral salts and their pH is equal to 7. A solution has pH value of 5. This can be written as: Question 5 Calcium carbonate reacts with dilute hydrochloric acid to form calcium chloride, carbon dioxide and water. Sodium carbonate and carbon dioxide are evolved when sodium hydro carbonate is heated. 1. Solution: 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. The gas evolved extinguishes a burning candle. Solution: Answer: (a) lemon juice Zn (s) + H2SO4 (aq) → ZnSO4 (aq) + H2 (g), (b) Magnesium ribbon + dil. But, with help of technology, it can converted into Bio-gas, which is an efficient and pollution free fuel. The common name of the compound CaOCl2 is bleaching powder. When the concentrated solution of an acid is diluted by mixing water, the concentration of hydronium ions H3O+ per unit volume decreases. (c) Litmus paper The reason of this is its tetravalency and catenation which has been discussed. Question 10. Solution: Complete NCERT Book Page wise Solution Class 10th as per Latest CBSE Syllabus SCIENCE Chapter-11, The Human Eye and the Colourful World The following page provides you NCERT book solutions for Class 10 SCIENCE, SCIENCE Class 10 notes in pdf are also available in the related links between the texts. 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. 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