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NCERT Solutions for Class 1 to 12, Free CBSE NCERT Solutions - Nov 27, �� NCERT Solutions for Class 10 are solved by experts of myboat089 boatplans in order to help students to obtain excellent marks in their board examination. All the questions and answers that are present in the CBSE NCERT Books has been included in this page. We have provided all the Class 10 NCERT Solutions with a detailed explanation i.e., we have solved all the questions with step by step solutions. NCERT Solutions for Class 10 Maths are solved by experts of myboat089 boatplans in order to help students to obtain excellent marks in their board examination. All the questions and answers that are present in the CBSE NCERT Books has been included in this page. We have provided all the Class 10 Maths NCERT Solutions with a detailed explanation i.e., we have solved all the question with step by step. NCERT Solutions for Class 10 Science: National Council of Educational Research and Training (NCERT) is a self-governing organization of the Indian government that provides the curriculum for CBSE and some state board schools in myboat089 boatplans the candidates appearing for different board exams of Class 10 can refer to this NCERT Syllabus and prepare for their examinations which in turn helps.
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If, however, water is added to concentrated acid to dilute it, a large amount of heat is evolved at once. The heat generated may cause the mixture to splash the acid on our face or clothes and cause acid burns. Question 10 How is the concentration of hydroxide ions OH- affected when excess base is dissolved in water? Solution: When the solution of a base is diluted by mixing more water in it, the concentration of hydroxide ions OH � ions per unit volume decreases. Question 11 You have two solutions A and B.

Solution: The pH of a solution is inversely proportional to its hydrogen ion concentration. This means that the solution having lower pH will have more hydrogen ion concentration. 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. Solution: Acids produce hydrogen ions in water.

So, when an acid is added to water, the concentration of hydrogen ions in water increases. The solution of acid thus formed will have more of hydrogen ions and it will be acidic in nature. If yes, why are these basic? Question 14 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?

Solution: Most often the soil in the fields is too acidic. 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. Thus, a farmer should add lime or slaked lime in his fields when the soil is too acidic. Question 15 What is the common name of the compound CaOCl 2?

Solution: The common name of the compound CaOCl 2 is bleaching powder. Question 16 Name the substance that on treatment with chlorine yields bleaching powder. Solution: Calcium hydroxide is the substance that on treatment with chlorine yields bleaching powder. Question 17 Name the sodium compound, which is used, for softening hard water. Solution: Sodium carbonate washing soda Ncert Solutions Class 10th 12.3 Visa is used for softening hard water. Question 18 What will happen if a solution of sodium hydro carbonate is heated?

Give the equation of the reaction involved. Sodium carbonate and carbon dioxide are evolved when sodium hydro carbonate is heated. Question 19 Write an equation to show the reaction between plaster of Paris and water. Solution: Plaster of Paris has a very remarkable property of setting into a hard mass on wetting with water. So, when water is added to plaster of Paris, it sets into a hard mass in about half an hour.

The setting of plaster of Paris is due to the hydration crystals of gypsum, which set to form a hard, solid mass. Question 20 Why does distilled water not conduct electricity, whereas rainwater does? Solution: Distilled water does not conduct electricity because it does not contain any ionic compound like acids, bases or salts dissolved in it.

On the other hand, rain water conducts electricity. 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 H 2 CO 3.

So, due to the presence of carbonic acid which provides ions to rain water , the rain water conducts electricity. Question 21 Why do acids not show acidic behaviour in the absence of water?

Solution: The acidic behaviour of acid is due to the presence of hydrogen ions. 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. Which solution is? Arrange the pH in increasing order of hydrogen-ion concentration. Question 23 Equal lengths of magnesium ribbons are taken in test tubes A and B.

In which test-tube will fizzing occur more vigorously and why? Fizzing occurs in the test tube due to the evolution of hydrogen gas by the action of acid on magnesium ribbon. Since hydrochloric acid is a strong acid a large amount of hydrogen gas is liberated in the test tube A. So fizzing occurs more vigorously in test tube A.

Question 24 Fresh milk has a pH of 6. Solution: The pH will change to below 6, as lactic acid is formed when milk turns into curd. Question 25 Plaster of Paris should be stored in a moisture-proof container. Solution: The presence of moisture can affect the slow setting of plaster of Paris by bringing about its hydration. This will make the plaster of Paris useless after some time. Question 26 What is a neutralization reaction? Solution: The reaction of an acid and a base, giving rise to the corresponding salt and water is called neutralization reaction.

Question 27 Give Ncert Solutions Class 10th Chapter 6 Visa two important uses of washing soda and baking soda. Solution: Washing soda 1. It is often used as an electrolyte. Domestically it is used as a water softener during laundry. Baking soda 1. It is used to test garden soil for acidity. If it develops bubbles, the soil is too acidic. Washing a car with it can remove dead bug bodies without damaging the paint. Question 1. Equal pieces of zinc granules are dropped in four test tubes. Following substances are poured in all the four test tubes.

Question 2. Which of the following statements shows the property of an acid? Thus, it has no effect on red litmus and acids are sour in taste. Question 3. A drop of a liquid sample was put on the pH paper. It was observed that the colour of the pH paper turned blue. The liquid sample is [CCE ] a lemon juice b sodium bicarbonate solution c distilled water d hydrochloric acid Answer: b The liquid sample is of sodium bicarbonate NaHC 3 solution.

It is a basic solution. And we know that a basic solution turns pH paper blue. Question 4. Two solutions X and Y were found to have pH value of 4 and 10 respectively. Question 5. A student was asked to collect apparatus from lab store, for doing experiment of pH of given sample. Identify the article which he is not supposed to pick. Question 6. Which one of the following would you need to identify the gas that evolve when you heat NaOH solution with zinc metal?

The gas will burn with a pop sound confirming the presence of hydrogen gas. Question 7. A solution has pH value of 5. Light Reflection and Refraction explains the concepts of reflection and refraction of light.

Some important topics to learn from this chapter are:. The Human Eye and Colorful World chapter students get to know each and every detail of the human eye from its structure to its working. Various defects of vision are also discussed here. It also explains atmospheric refraction and various phenomena related to it.

Some major topics discussed in this chapter are:. Electricity chapter explains electric current, its applications and various effects related to it.

Sources of Energy: Different forms of energy and their sources are discussed in this chapter. Some of the main topics explained in this chapter are:. Our Environment chapter deals with various components of environment components and how human activities are affecting the environment.

Some of the main topics discussed in this chapter are:. Sustainable Management of Natural Resources chapter you get to know about the different natural resources, their advantages and conservation efforts. Here main focus should be laid on the following concepts:.

You can get them online at our website or else directly click on the quick links available on our page. Polynomials Class 10 has total of four exercises consists of 13 Questions. Problems related to finding polynomials, Properties zeros and coefficient, long division of polynomials, finding a quadratic polynomial, finding zeros of polynomials are scoring topics. Pair of Linear Equations Class 10 has total of seven exercises consists of 55 Problems.

The problems will be based on concepts like linear equations in two variables, algebraic methods for solving linear equations, elimination method, cross-multiplication method Time and Work, Age, Boat Stream and equations reducible to a pair of linear equations these answers will give you ease in solving problems related to linear equations.

Quadratic Equations Class 10 has total of four exercises consists of 24 Problems. The Questions are related to find roots of quadratic equations and convert world problem into quadratic equations are easily scoring topics in board exams. Arithmetic Progressions Class 10 has total of four exercises consists of 49 Problems. Triangles Class 10 has total of six exercises consists of 64 Problems.

The Questions are based on properties of triangles and 9 important theorems which are important in scoring good marks in CBSE Class 10 Exams. Coordinate Geometry Class 10 has total of four exercises consists of 33 Problems. The Questions related to finding the distance between two points using their coordinates, Area of Triangle, Line divided in Ratio Section Formula are important models in class 10 boards. Introduction to Trigonometry Class 10 has total of four exercises consists of 27 Problems.

The questions based on trigonometric ratios of specific angles, trigonometric identities and trigonometric ratios of complementary angles are Ncert Solutions Class 10th 3.6 Visit the main topics you will learn in this chapter.

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