NCERT Solutions for Class 10 Science all chapters in PDF for NCERT Solutions for Class 10 Science involves concepts from biology, physics, and chemistry. Candidates must possess a detailed knowledge of the NCERT Solutions based on the syllabus to get the good results in the board exams. NCERT Science syllabus for Class 10 is designed to provide a Chapter For Science 10th Solutions 2 Chem Ncert Class Solutions Chapter Class For 10th Chem Science 2 Ncert Ncert Solutions For Class 10th Science Chapter 2 Chem Ncert Solutions For Class 10th Science Chapter 2 Chem Ncert Solutions For Class 10th Science Chapter 2 Chem strong foundation for various exams such as JEE, NEET, etc. NCERT Solutions for Class 10 Science Chapter 1 � Chemical reactions and equations is an outstanding study resource needed for Ncert Solutions For Class 10th Science Chapter 2 Chem the students studying in CBSE Class These NCERT Solutions are crafted as per the latest CBSE syllabus by subject experts at BYJU�S. myboat329 boatplans offers NCERT Solutions, RD Sharma Solutions, Ncert Solutions For Class 10th Science Chapter 2 Chem Ncert Solutions For Class 10th Science Chapter 2 Chem Solutions 2 Ncert For Class Science 10th Chem Chapter video lectures, notes, tests, textbook solutions, CBSE sample papers, solved past year papers, Formulas, and Extra Questions for CBSE, IIT JEE Main and Advanced, NEET. Start your preparation with myboat329 Ncert For Science 10th 2 Class Chem Solutions Chapter boatplans now.
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Calculate the osmotic pressure in pascals exerted by a solution prepared by dissolving 1. Define the terra solution. How many types of solutions are Ncert Solutions For Class 10th Science Chapter 2 Chem formed? Write briefly about each type with an example. Sol: A solution is a homogeneous mixture of two or more chemically non-reacting substances. Types of solutions: There are nine types of solutions. Liquid solutions a Gas in liquid C02 dissolved in water aerated water , and 02 dissolved in water, etc. Solid solutions a Gas in solid Solution of hydrogen in palladium b Liquid in solid Amalgams, e.

Suppose a solid solution is formed between two substances, one whose particles are very large and the other whose particles are very small. What Ncert Solutions For Class 10th Science Chapter 2 Chem type of solid solution is this likely to be? Sol: The solution likely to be formed is interstitial solid solution.

If A is the number of moles of Ncert Solutions For Class 10th Science Chapter 2 Chem solute dissolved in B moles of solvent, then Mole fraction of solute ii Molality: It is defined as die number of moles of a solute present in g 1kg of a solvent. NOTE: Molality is considered better way of expressing concentration of solutions, as compared to molarity because molality does not change with change in temperature since the mass of solvent does not vary with temperature, iii Molarity: It is defined as the number of moles of solute present in one litre of solution.

NOTE: Molarity is the most common way of expressing concentration of a solution in laboratory. However, it has one disadvantage. It changes with temperature because volume of a solution alters due to expansion and contraction of the liquid with temperature. If the density of solution is 1.

How many mL of 0. Sol: Calculation of no. An antifreeze solution is prepared from Calculate the molality of the solution. If the density of the solution is 1. A sample of drinking water was found to be severely contaminated with chloroform CHCl 3 , supposed to be a carcinogen. The level of contamination was 15 ppm by mass. Sol: 15 ppm means 15 parts in million 10 6 by mass in the solution. What role does the molecular interaction Ncert Solutions For Class 10th Science Chapter 2 Chem Ncert Solutions For Class 10th Science Chapter 2 Chem play in solution of alcohol in water? Sol: In case of alcohol as well as water, the molecules are interlinked by intermolecular hydrogen bonding.

However, the hydrogen bonding is also present in the molecules of alcohol and water in the solution but it is comparatively less than both alcohol and water. This will lead to increase in vapour pressure of the solution and also decrease in its boiling point. Why do gases always tend Ncert Solutions For Class 10th Science Chapter 9 Year to be less soluble in liquids as the temperature is raised? Sol: When gases are Ncert Solutions For Class 10th Science Chapter 2 Chem dissolved in water, it is accompanied by a release of heat energy, i. If the bottle is opened by removing the stopper or seal, the pressure on the surface of Ncert Solutions For Class 10th Science Chapter 2 Chem the gas will suddenly decrease.

This will cause a decrease in the solubility of the gas in the liquid i. As a result, it will rush out of the bottle producing a hissing noise or with a fiz. In tissues, the partial pressure of oxygen is comparatively low. Therefore, oxyhaemoglobin releases oxygen in order to carry out cellular activities. The Ncert Solutions For Class 10th Science Chapter 2 Chem partial pressure of ethane over a solution containing 6. If the solution contains 5. So there is expansion in volume on solution formation.

So weaker interactions are replaced by stronger Ncert Solutions For Class 10th Science Chapter 2 Chem Ncert Solutions For Class 10th Science Chapter 2 Chem interactions so , there is release of energy i. What is the molecular mass of the solute? At K, the vapour pressures of the two liquid components are What will be the vapour pressure of a mixture of The vapour pressure of water is Calculate vapour pressure of 1 molal solution of a non-volatile solute in it Sol: 1 molal Ncert Solutions For Class 10th Science Chapter 2 Chem solution of solute means 1 mole of solute in g of the solvent.

A solution containing 30g of non-volatile solute exactly in 90 g of water has a vapour pressure of 2. Further, 18g of water is then added to the solution and the new of vapour pressure becomes 2. Calculate i molar mass of the solute. When dissolved in Solutions Ncert Chem Chapter 2 Class For Science 10th 20g of benzene C 6 H 6 , 1 g of AB 2 lowers the freezing point by 2. The molar depression constant for benzene is 5.

Calculate atomic masses of A and B. Which of this is acidic and which one is basic? Answer: A pH value of less than 7 indicates an acidic solution, while greater than 7 indicates Ncert Solutions For Class 10th Science Chapter 2 Chem a basic solution. Since solution A has more hydrogen ion concentration, solution A is acidic and solution B is basic.

If yes, then why are these basic? But these are Ncert Solutions For Class 10th Science Chapter 2 Chem 2 Class Chem Chapter Solutions 10th Science For Ncert far less in number than OH � ions that is responsible for their basic nature. Question 4 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?

Answer: If the soil is too acidic having low pH then it Ncert Solutions For Class 10th Science Chapter 2 Chem is treated with materials like quick lime calcium oxide or slaked lime calcium hydroxide or chalk calcium carbonate. Question 1 What is the common name of the compound Ncert Solutions For Class 10th Hindi Chapter Kartoos University CaOCl 2?Ncert Solutions For Class 10th Science Chapter 2 Chem

Answer: Bleaching powder. Question 2 Name the substance which on treatment with chlorine yields bleaching powder. Answer: Slaked lime Ca OH 2. Question 3 Name the sodium compound which is Ncert Solutions For Class 10th Science Chapter 2 Chem used for softening hard water. Answer: Sodium carbonate. Question 4 What will happen if a solution of sodium hydrogen carbonate is heated. Give the equation of the reaction involved? Answer: Class Chapter 2 10th Science Ncert For Chem Solutions Science For 2 Ncert Class Chapter Chem 10th Solutions Solution of sodium hydrogen carbonate on heating gives sodium carbonate and carbon dioxide gas is evolved.

Question 5 Write an equation to show the reaction between plaster of Paris and Ncert Solutions For Class 10th Science Chapter 2 Chem Solutions Chapter Class 10th For Ncert 2 Chem Science Ncert Solutions For Class 10th Science Chapter 2 Chem water. Question 1 A solution turns red litmus blue, its pH is likely to be a 1 b 4 c 5 d 10 Answer: d Question 2 A solution reacts Ncert Solutions For Class 10th Science Chapter 2 Chem with crushed-egg shells to give a gas that turns lime water milky.

Question 4 Which one of the following types of medicines is used for treating indigestion? Question 6 Compounds Ncert Solutions For Class 10th Science Chapter Ncert Solutions Class 10th Chemistry Chapter 4 Chem 2 Chem such as alcohol and glucose also contain hydrogen but are not categorised as acids. Describe an activity to prove it. The bulb does not glow in this case also. This shows that alcohols and glucose are not acids. Question 7 Why does distilled water not conduct electricity, whereas rainwater does?

Answer: Distilled water does not conduct electricity because it does not contain any ionic compound like acids, bases or salts dissolved in it. Rainwater, 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. Hence, due to the presence of carbonic acid which provides ions to rainwater, the rainwater conducts electricity. Question 8 Why 2 Chem For Class Solutions Ncert 10th Science Chapter do acids not show acidic behaviour in the absence of water?

The acid produces hydrogen ions only in the presence of water. So in the absence of water, an acid Ncert Solutions For Class 10th Science Chapter 2 Chem will not form hydrogen ions and hence will not show its acidic behaviour. Which solution is a Neutral b Strongly alkaline c Strongly acidic d Weakly acidic e Weakly alkaline Ncert Solutions For Class 10th Science Chapter 2 Chem Ncert Chapter 10th Science Class Solutions Chem 2 For Ncert Solutions For Class 10th Science Chapter 2 Chem Arrange the pH in increasing order of hydrogen ion concentration.

Question 10 Equal lengths of magnesium ribbons are taken in test tubes A and B. In which test tube will Ncert Solutions For Class 10th Science Chapter 2 Chem Ncert Solutions For Class 10th Science Chapter 2 Chem the fizzing occur more vigorously and why? Answer: Fizzing will occur more vigorously in test tube A. 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.

The fizzing is due to the evolution of hydrogen Ncert Solutions For Class 10th Science Chapter 2 Chem gas which is formed by the action of acid on the magnesium metal of magnesium ribbon. Question 11 fresh milk has a pH of 6. How do you think the Ncert Solutions For Class 10th Science Chapter 2 Chem pH will change as it turns into curd? Explain your answer. Answer: pH of milk falls below 6 as it turns into curd due to the formation of lactic acid Ncert Solutions For Class 10th Science Chapter 2 Chem during this process.

Lactic acid present in it reduces its pH value. Question 12 A milkman adds a very small amount of baking soda to fresh milk. Answer: a Milk is made slightly alkaline so that it may not get sour easily due to the formation of lactic acid in it. Question 13 Plaster of Paris should be stored in a moisture proof container. Explain why? Answer: 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.

This will make the plaster of Paris useless after sometime. Question 14 What is a neutralisation reaction? Give two examples. Answer: The reaction between Class For Chapter 10th Solutions 2 Science Chem Ncert an acid and a base to form salt and water is called a neutralisation reaction. Question 15 Give two important uses of washing soda and baking soda. Answer: Uses of Ncert Solutions For Class 10th Science Chapter 2 Chem washing soda : i Washing soda is used in glass, soap and paper industries. Uses of baking soda : i Baking soda is used as an antacid in medicines to remove For Solutions Chem Class 2 10th Ncert Chapter Science 10th Ncert Solutions Chem Chapter Science For 2 Class acidity of the stomach.

One of them contains distilled water and the other two contain an acidic solution and a basic solution respectively. Solution: The contents of each test tube Ncert Solutions For Class 10th Science Chapter 2 Chem Ncert Solutions For Class 10th Science Chapter 2 Chem would be identified by change in colour of red litmus paper. For example, when we wet the red litmus paper with the basic solution, it changes into blue colour. Put the changed blue litmus paper in the solution which turns the blue to red will be the acidic solution.

The solution, which has no effect on any litmus paper, will be neutral and hence it will be distilled water. Question 2 Why should curd and sour substances not be kept in brass and copper vessels?

Solution: Curd and other sour Ncert Solutions For Class 10th Science Chapter 2 Chem foodstuffs contain acids, which can react with the metal of the vessel to form poisonous metal compounds which can cause food poisoning and damage our health. Question 3 Which gas Ncert Solutions For Class 10th Science Chapter 2 Chem Chapter Solutions Ncert Chem 10th For 2 Class Science is usually liberated when an acid reacts with a metal?

Solution: When an acid reacts with metal, a salt and hydrogen gas is formed. Question 4 Metal compound A reacts with dilute hydrochloric acid to produce effervescence. Solution: The gas that extinguishes a burning candle is carbon dioxide, which is formed by the action of dilute hydrochloric acid on a metal carbonate and produces effervescence. Now, since one of the compounds formed is calcium chloride, it shows that the metal compound is calcium carbonate.

Thus, the metal compound A Ncert Solutions For Class 10th Science Chapter 2 Chem is calcium carbonate CaCO 3. Calcium carbonate reacts with dilute hydrochloric acid to form calcium chloride, carbon dioxide and water. This can be written as:. The compounds such as glucose and alcohol also contain hydrogen but they do not show acidic character. Question 6 Why does an aqueous solution of acid conduct electricity? Solution: The aqueous solution of an acid conducts electricity due to the presence of charged particles called ions in it.

Question 7 Why does dry HCl gas not change the colour of the dry litmus paper? Solution: Dry HCl gas does not contain any hydrogen ions in it, so it does not show acidic behaviour. Question 8 While diluting an acid, why is it recommended that the 2 Ncert 10th Chem Chapter Solutions Class For Science acid should be added to water and not water to the acid? Solution: Diluting an acid should be done by adding concentrated acid to water gradually with stirring and not Ncert Solutions For Class 10th Science Chapter 2 Chem Ncert Solutions For Class 10th Science Chapter 2 Chem by adding water to concentrated acid.

The heat is evolved gradually when a concentrated acid is added to water for diluting an acid and the large amount of water is easily absorbed. 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 Ncert Solutions For Class 10th Science Chapter 2 Chem 10th For Class Science 2 Solutions Chem Ncert Chapter 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 For 10th Chapter 2 Class Science Chem Solutions Ncert Ncert Solutions For Class 10th Science Chapter 2 Chem 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 Ncert Solutions For Class 10th Science Chapter 2 Chem 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 Ncert Solutions For Class 10th Science Chapter 2 Chem For Solutions Chem 2 Ncert Science Chapter Class 10th 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 Ncert Solutions For Class 10th Science Chapter 3 Data 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, Ncert Solutions For Class 10th Science Chapter 2 ChemNcert Solutions For Class 10th Science Chapter 2 Chem rong> 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: Ncert Solutions For Class 10th Science Chapter 2 Chem 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 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 Ncert Solutions For Class 10th Science Chapter 2 Chem 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 Ncert Solutions For Class 10th Science Chapter 2 Chem Ncert Solutions For Class 10th Science Chapter 2 Chem 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 Ncert Solutions For Class 10th Science Chapter 2 Chem 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 Ncert Solutions For Class 10th Science Chapter 2 Chem Ncert Solutions For Class 10th Science Chapter 2 Chem 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.

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