A drop of a liquid sample was put on the pH paper. If the coil is placed near to a current-carrying conductor, the magnetic field may change either due to a change in the current through the conductor or due to the relative motion between the coil and conductor. Similarly, with the help of technology, wind energy can be harnessed by placing many wind mills in a large field creating a wind farm. What is the common name of the compound CaOCl2 ? But before that, the students have to face Class 10 Science Board Exam which is equally demanding. Metal compound A reacts with dilute hydrochloric acid to produce effervescence. What effect does the concentration of H+(aq) ions have on the nature of the solution? The concept of live wire, neutral wire and earth wire is discussed. The aqueous solution of an acid conducts electricity due to the presence of charged particles called ions in it. (b) The liquid sample is of sodium bicarbonate (NaHC3) solution. Adding water to a concentrated acid, the heat generated may cause the mixture to splash out and cause burns. Download Exemplar solutions for class 10 Maths in order to score good marks in CBSE board exams. 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. fresh milk has a pH of 6. Washing Soda (Na2CO3. Sodium carbonate (washing soda) is used for softening hard water. How is the concentration of hydroxide ions (OH-) affected when excess base is dissolved in water? Four set ups as given below are arranged to identify the gas evolved when dilute hydrochloric acid was added to zinc granules. Chemical Properties Of Acids (a) 1 Q1. If the soil is too acidic (having low pH), it is treated with materials like quicklime (calcium oxide) or slaked lime (calcium hydroxide) or chalk (calcium carbonate). Question 3 (c) Antacid 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. A solution has pH value of 5. Baking soda How do you think the pH will change as it turns into curd ? Uses of washing soda : The inner lining of stomach protects vital cells from the acidic pH which is developed by HCl secreted by stomach. (d) As pH paper turns greenish blue for weakly basic compound and antacids contain weak base like Mg(OH)2. 11 < 9 < 7 < 4 < 1 (d) Weakly acidic NCERT Exemplar Class 10 Science Solutions Chapter 1 Chemical Reactions and Equations 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: Question 8. Therefore, the reaction between calcium carbonate and hydrochloric acid is. (b) 8 mL Question 13 (c) III (b) Both X and Y are acidic solutions (v) The bulb does not glow. (b) Salts which are completely ionisable in water are said to be neutral salts and their pH is equal to 7. 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). The direction of the induced current is given by the Fleming’s right-hand rule. (UP 2007, 15) Or Question 2 Bring a burning candle near the soap bubble filled with gas. More the concentration of H+ ions, higher the acidic nature of the 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. 2. (b) C The pH of this salt solution was found to be 7 by measuring the pH with a universal indicator paper. Hence, due to the presence of carbonic acid which provides ions to rainwater, the rainwater conducts electricity. Acids + Metal oxide → Salt + Water Answer: Answer: 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. No, the basic solution doesn’t have H+ ions as the solution has excess of hydroxide ions. The reaction between an acid and a base to form salt and water is called a neutralisation reaction. Theses chapters are divided into 5 units. (d) Lime water The aqueous solution of an acid conducts electricity due to the presence of charged particles called ions in it. H2 gas is not soluble in water. But, with help of technology, it can converted into Bio-gas, which is an efficient and pollution free fuel. Carbonic acid provides hydrogen ions, H+(aq), and carbonate ions, CO2-3 (aq), to rain water. (a) I Question 5. Thus, it has no effect on red litmus and acids are sour in taste. Metals and nonmetals class 10: The NCERT Solutions for Class 10 Science is designed to provide a strong foundation for further studies in science. This is the basis of an electric motor. Why does an aqueous solution of acid conduct electricity? 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