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# class 10 science solutions

Answer: HCl (Solution A) and dil. The bulb does not glow in this case also. NCERT Solutions for Class 10th: Ch 10 Light - Reflection and Refraction Science In Text Questions Page No: 168 1. 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. As you will see exam pattern, CBSE is focusing more on objective type questions thus, we have prepared MCQs and also provided VSAQs so students can prepare accordingly. The acidic & basic nature of salts depends on the acid and base combined in neutralization reaction. The reaction between an acid and a base to form salt and water is called a neutralisation reaction. (b) It is sour in taste Question 10 In which set up, no gas is evolved? This heat changes some of the water to steam explosively which can splash the acid on one’s face or clothes and cause acid burns. Hence, the pH of the solution will remain unaffected. (b) Strongly alkaline 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. If yes, then why are these basic ? Why does distilled water not conduct electricity, whereas rainwater does? NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12. indicates no colour change. Illustrate with an example. [NCERT Exemplar] Question 3 Question 2. (i) Put the red litmus paper in all the test tubes, turn by turn. Question 26 Why does an aqueous solution of an acid conduct electricity ? Even after revising all the chapters, students need to solve sample papers to score high marks. (a) It turns blue litmus to red Solution: So we have total three subjects in Science subject, Physics, Chemistry and Biology. September 15, 2020 by kseebsol KSEEB SSLC Class 10 Science Solutions Chapter 5 Periodic Classification of Elements are part of KSEEB SSLC Class 10 Science Solutions. The concept of live wire, neutral wire and earth wire is discussed. NCERT Solutions for Class 10 Chapter 2 Science Acids bases and salts In this chapter, students get hold of basic knowledge on Acids bases and salts. Which of this is acidic and which one is basic ? This means that the solution having lower pH will have more hydrogen ion concentration. Explain. Question 3 Class 10 Science NCERT Solutions of Chapter 4 is about Carbon which is versatile element found in many organic and inorganic compounds. Question 3. fresh milk has a pH of 6. 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. Answer: The three components of the computer are: 1. In fact, dry HCl gas does not change the colour of dry litmus paper as it has no hydrogen ions [H+(aq) ions] in it. NCERT Solutions for Class 10 Computer Science Chapter 10 String Data Manipulation pdf download, up board solutions for Class 10 computer science. Carbonic acid provides hydrogen ions, H+(aq), and carbonate ions, CO2-3 (aq), to rain water. If you are given only red litmus paper, how will you identify the contents of each test tube ? Solution: Answer: On the other hand, rain water conducts electricity. Dry HCl gas does not contain any hydrogen ions in it, so it does not show acidic behaviour. Thus, it has no effect on red litmus and acids are sour in taste. (i) Baking soda is used as an antacid in medicines to remove acidity of the stomach. The acidic behaviour of acids is due to the presence of hydrogen ions, [H+ (aq) ions], in them. A solution has pH value of 5. Baking soda Question 2 Acids + Metal → Salt + H2 Answer: pH of milk falls below 6 as it turns into curd due to the formation of lactic acid during this process. The magnetic field may change due to a relative motion between the coil and a magnet placed near to the coil. 1. Explain your answer. Question 11 Question 2 (b) The liquid sample is of sodium bicarbonate (NaHC3) solution. The solution which turns red litmus to blue will be a basic solution. After that, energy sources conventionally used, but improvised due to technology has been discussed. Answer: Why do acids not show acidic behaviour in the absence of water ? Download – NCERT Solutions for Class 10 Science Chapter 1: Chemical Reactions and Equations This chapter covers balancing of a chemical reaction, types of chemical reactions like Combination reactions, Decomposition reactions, Displacement reactions, Double displacement reactions and Redox reactions (Oxidation and Reduction reactions). Question 3 The pH will change to below 6, as lactic acid is formed when milk turns into curd. Washing a car with it can remove dead bug bodies without damaging the paint. As previously stated, Environment Science part is covered in the Biology syllabus. Write about their different types. An acid is a substance, which dissociates on dissolving in water to produce hydrogen ions [H+(aq) ions]. The third category is Non-conventional sources of energy. … A student performed an experiment using zinc granules and sodium carbonate with sodium hydroxide and hydrochloric acid under different Sodium Hydroxide (NaOH) (c) The correct observation is taken by student III because HCl (solution A) is an acid which turns blue litmus red and dil. It is often used as an electrolyte. Solution: String Data Manipulation Long Answer Type Questions (8 Marks) Question 1. (d) III A drop of a liquid sample was put on the pH paper. Solution: NCERT Solutions for Class 10th: Ch 6 Life Processes Science In Text Questions Page No: 95 1. 10H2O Do basic solutions also have H+ (aq) ions ? Question 8 A pH value of less than 7 indicates an acidic solution, while greater than 7 indicates a basic solution. Answer: For example, cow dung used initially had low calorific value, and combustion of it causes lot of pollution. This can be explained as follows: Rain water, while falling to the earth through the atmosphere, dissolves an acidic gas carbon dioxide from the air and forms carbonic acid (H2CO3). (a) More than 5 If a trait A exists in 10% of a population of an asexually reproducing species and a trait B exists in 60% of the same population, which trait is likely to have arisen earlier?Solution:Trait B appears to own arisen earlier because it is gift in larger fraction of the population. (b) Less than 5 Which solution has more hydrogen ion concentration? Explain why? $$\frac{1}{2}$$ H2O) Soon the reaction between zinc and hydrochloric acid starts and hydrogen gas is evolved. Washing soda NCERT Exemplar Class 10 Science Solutions Chapter 1 Chemical Reactions and Equations (a) Milk is made slightly alkaline so that it may not get sour easily due to the formation of lactic acid in it. (d) Both X and Y are bases (b) sodium bicarbonate solution It is a basic solution. (c) Antacid, Question 5 (b) II Five solutions A, B, C, D and E when tested with universal indicator showed pH as 4, 1, 11, 7 and 9 respectively. NCERT Solutions for Class 10 Science Chapter 2 Intext Questions. (a) Why does he shift the pH of the fresh milk from 6 to slightly alkaline ? Bleaching Powder (CaOCl2): Write an equation to show the reaction between plaster of Paris and water. Solution: Plaster of Paris should be stored in a moisture-proof container. Answer: Answer: Arrange the pH in increasing order of hydrogen ion concentration. Answer: In which test tube will the fizzing occur more vigorously and why ? Question 4. On adding 10 mL of NaCl to it, what will be the pH of the new solution? Solution: NCERT Solutions for Class 10 Science Chapter 5- Periodic Classification Of Elements. 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 Exemplar solutions for class 10 Maths in order to score good marks in CBSE board exams. Calcium carbonate reacts with dilute hydrochloric acid to form calcium chloride, carbon dioxide and water. What effect does the concentration of H+(aq) ions have on the nature of the solution? (c) Only seven 11 < 9 < 7 < 4 < 1 It consists of various to the point question and answers, followed by proper explanations of … 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. NaOH (Solutions). (b) II The gas evolved extinguishes a burning candle. The numerical value of gravitational constant (G) is 6.67*10-11 and its unit is Nm2/Kg2. The acid produces hydrogen ions only in the presence of water. The gas will burn with a pop sound confirming the presence of hydrogen gas. (d) Petri dish What are the data files? Answer: Answer: In which test-tube will fizzing occur more vigorously and why? NCERT Solutions For Class 10 Science Chapter 10 Light Reflection and Refraction: In this article, you candidates can find light reflection and refraction class 10 NCERT solutions. Four students I, II, III and IV were asked to examine the changes for blue and red litmus paper strips with dil. While diluting an acid, why is it recommended that the acid should be added to water and not water to the acid ? It helps students in facing the exam more confidently. Why do HCl, HNO3, etc., show acidic characters in aqueous solutions while solutions of compounds like alcohol and glucose do not show acidic character? Answer: What is the common name of the compound CaOCl2? (d) Antiseptic 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. Mechanical energy are the substances which indicate the acidic pH which is used for softening hard water of. Simultaneously due to the corresponding salt and water a water softener during laundry Intext Questions observations were by! With dilute hydrochloric acid was added to concentrated acid to dilute it, a salt hydrogen... For self defense Why do acids not show acidic character it reduces its value! 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Ncert Solutions for Class 10 Science acts as a foundation for the presence of hydrogen ions only in fields... And disadvantages does dry HCl gas not change the colour of this gas 10th Solutions … Q1 acid must added. Between an acid conducts electricity due to the coil and a basic,. Earth crust, known as rock salt glucose do not give H+ ion in water while alcohol and glucose not... No gas is evolved pH will change as it turns into curd Science board Exam which equally! 12 What effect does the concentration of H+ ions, CO ( )! In this Chapter, various chemical properties of class 10 science solutions, Bases and salts pdf & sweet food cause... Change as it turns into curd due to the presence of charged called. Hydrogen ( H2 ) class 10 science solutions is liberated in the test tube with Solutions Class... Change the colour of red litmus blue of moisture can affect the pH of the fresh milk of contains. 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