Explain why? What will happen if a solution of sodium hydro carbonate is heated? Plaster of Paris should be stored in a moisture-proof container. (a) CH3COOH H2SO4 + CuO → CuSO4 + H2O, Bases + Metals → Salt + H2 Which of this is acidic and which one is basic ? 2. The direction of the induced current is given by the Fleming’s right-hand rule. Question 2 Answer: (b) 8 mL More the concentration of H+ ions, higher the acidic nature of the solution. Which solution is? The soap bubble bursts and hydrogen gas burns with a pop sound. Sodium carbonate and carbon dioxide are evolved when sodium hydro carbonate is heated. Solution: Sulphuric acid > Aluminium sulphate + Hydrogen (b) Both X and Y are acidic solutions Question 3 (d) An antacid (b) Strongly alkaline (i) Neutral? 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) ? … The acidic & basic nature of salts depends on the acid and base combined in neutralization reaction. Four set ups as given below are arranged to identify the gas evolved when dilute hydrochloric acid was added to zinc granules. What is the common name of the compound CaOCl2? (b) Analgesic Question 1 7. Since ancient times, it’s been proved several times that Science has the capacity to revolutionize the phases of Mankind. Question 9. Distilled water does not conduct electricity because it does not contain any ionic compound (like acids, bases or salts) dissolved in it. When passed through soap solution, it gets trapped into bubbles. Chemical Properties Of Acids Question 6 (iii) Test for H2 gas : 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. Question 15 The heat generated may cause the mixture to splash the acid on our face or clothes and cause acid burns. 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. 2. H+ ions in aqueous solution are responsible for acidic character. NCERT Solutions for Class 10 Science (Chemistry) Chapter 2 Acids, bases, and salts are part of NCERT Solutions for Class 10 Science. By referring to the 5 Science class 10 solutions available for NCERT, the students are able to avail a simpler procedure of learning. 2NaOH + Zn → Na2ZnO2 + H2 Question 4 The third category is Non-conventional sources of energy. Some animals like bee and plants like nettle secretes highly acidic substance for self defense. Question 24 Plaster of Paris (CaSO4. Carbonic acid provides hydrogen ions, H+(aq), and carbonate ions, CO2-3 (aq), to rain water. Question 1 Ca(OH)2 + Cl2 → CaOCl2 + H2O Examples: Question 15 Going through them will help you in getting a better understanding of how to solve problems. Answer: 10H2O 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. This NCERT Solutions has questions-related to an electric cell, electric bulb, electric circuits, switches, conductors and insulators, examples of conductors and insulators. The inference that can be drawn is [CCE 2014] Why does dry HCl gas not change the colour of the dry litmus paper? Answer: Metals and nonmetals class 10: The NCERT Solutions for Class 10 Science is designed to provide a strong foundation for further studies in science. The acidic behaviour of acid is due to the presence of hydrogen ions. (a) lemon juice NCERT Solutions for Chapter 1 - Chemical Reactions and Equations, NCERT Solutions for Chapter 2 - Acids, Bases and Salts, NCERT Solutions for Chapter 3 - Metals and Non-metals, NCERT Solutions for Chapter 4 - Carbon and its Compounds, NCERT Solutions for Chapter 5 - Periodic Classification of Elements, NCERT Solutions for Chapter 6 - Life Processes, NCERT Solutions for Chapter 7 - Control and Coordination. indicates no colour change. File Operation Long Answer Type Questions (8 Marks) Question 1. (d) IV Metal compound A reacts with dilute hydrochloric acid to produce effervescence. Question 6 Carbonate = Salt + CO2 Publisher : Janak. H2 gas is not soluble in water. Why does dry HCl gas not change the colour of the dry litmus paper ? (ii) Strongly alkaline? NCERT Solutions for Class 10 Computer Science Chapter 10 String Data Manipulation pdf download, up board solutions for Class 10 computer science. (b) The liquid sample is of sodium bicarbonate (NaHC3) solution. Nuclear energy can generated by controlled Nuclear fission reactions. You have two solutions A and B. Question 11. It helps students in facing the exam more confidently. It is the fixed number of water molecules present in one formula unit of a salt e.g. pH of milk falls below 6 as it turns into curd due to the formation of lactic acid during this process. NCERT Solutions for Class 10 Computer Science Chapter 11 File Operation pdf download, up board solutions for Class 10 computer science. (b) II The inner lining of stomach protects vital cells from the acidic pH which is developed by HCl secreted by stomach. Among the given salts, only KCl is completely ionisable in the following manner: KCl (aq) → K+ + Cl . < 7) and Yis a base (pH =10, i.e. e.g NaHCO3 + HCl → NaCl + H2O + CO2 What effect does the concentration of H+(aq) ions have on the nature of the solution? Which of the following statements shows the property of an acid? Answer: The pH of solution A is 6 and pH of solution B is 8. The clear supernatant solution turns the pH paper yellowish orange. Answer: Solution: Question 1 (d) No change in pH 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. Solution: While diluting an acid, why is it recommended that the acid should be added to water and not water to the acid ? Acids + Bases → Salt + water (d) 10 As previously stated, Environment Science part is covered in the Biology syllabus. Question 27 NCERT Solutions for Class 10 Science Chapter 5 – Free PDF Download. Question 7 Solution: (d) hydrochloric acid (a) I Read on to find out NCERT Solutions for Class 10 Science Chapter 2 Exercise and Extra Questions. [NCERT Exemplar] 220V is maintained between live wire which is insulated red and neutral wire which is insulated black. The pH of solution A is 6 and pH of solution B is 8. The aqueous solution of an acid conducts electricity due to the presence of charged particles called ions in it. 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. Solution: Answer: Which one of the following would you need to identify the gas that evolve when you heat NaOH solution with zinc metal? A solution turns red litmus blue, its pH is likely to be Question 8 dry slaked lime. 10H2O) : Answer: Question 9 (b) 4 For example, when we wet the red litmus paper with the basic solution, it changes into blue colour. NaOH + HCl → NaCl + H2O Answer: In this category, we have energy sources like solar energy, in which energy is generated through solar cell and solar panel, or by solar cooker. CuSO4.5H2O, Na2CO3.10H2O. conditions as shown below. It consists of various to the point question and answers, followed by proper explanations of … (c) III It works on the basis of electromagnetic induction. The pH of a solution is inversely proportional to its hydrogen ion concentration. 1. Ans: A coin and feather when dropped in vacuum falls simultaneously due to free fall as there is no external resistance in vacuum. Why does distilled water not conduct electricity, whereas rainwater does ? Four students I, II, III and IV were asked to examine the changes for blue and red litmus paper strips with dil. On the other hand, rain water conducts electricity. Describe an activity to prove it. What is the common name of the compound CaOCl2 ? Which solution is In this chapter, various chemical properties of acids, bases and salts and the reaction of them with metals, non-metals are studied. Answer: (a) Na2CO3 Arrange the pH in increasing order of hydrogen ion concentration. If yes, then why are these basic ? Question 4 Hence, due to the presence of carbonic acid which provides ions to rainwater, the rainwater conducts electricity. So, when an acid is added to water, the concentration of hydrogen ions in water increases. 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. [CCE 2014] (d) 16 mL, Question 4 Here we have given Class 10 Science NCERT Solutions Chapter 2. Going through the step-wise solutions for every question too is highly important to bag a good score. Solution: The acids will not show its acidic behaviour in the absence of water, this is because the acids produce hydrogen ions only in the presence of water. ii. Calcium hydroxide is the substance that on treatment with chlorine yields bleaching powder. The reaction of an acid and a base, giving rise to the corresponding salt and water is called neutralization reaction. The setting of plaster of Paris is due to the hydration crystals of gypsum, which set to form a hard, solid mass. NCERT Solutions for Class 10th: Ch 4 Carbon and its Compounds Science In Text Questions Page No: 61 1. Write an equation to show the reaction between plaster of Paris and water. (c) A burning splinter / matchstick Question 3. HCl, HNO3, etc. (c) 12 mL Thus, it will not affect the pH of the solution. (d) As pH paper turns greenish blue for weakly basic compound and antacids contain weak base like Mg(OH)2. (b) HCl The liquid sample is [CCE 2014] 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. Therefore, the reaction between calcium carbonate and hydrochloric acid is. In which test-tube will fizzing occur more vigorously and why? (e) Weakly alkaline It is often used as an electrolyte. Question 2 While diluting an acid it is recommended that the acid should be added to water and not water to the acid because if water is added to concentrated acid to dilute it, then a large amount of heat is evolved at once.