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NCERT Solutions for Class 10 Science Chapter 2 Acids, Bases and Salts - Free PDF The NCERT Solutions Class 10 Science Chapter 2 has been Class 10th Ncert Chemistry Chapter 2 Date created and reviewed by some of the most experienced and topmost chemistry faculties in India so you can be confident about the credibility of these Class 10th Ncert Chemistry Chapter 2 Date answers. There is a high possibility of having questions from the chapter acid bases and salts class 10 in board exams and the class Access Class 10th Ncert Chemistry Chapter 2 Date Answers to NCERT Class 10 Maths Chapter 2 � Polynomials Exercise Page: 1. The graphs of y = p(x) are given in Fig. below, for Class 10th Ncert Chemistry Chapter 2 Date some polynomials p(x). NCERT Solutions for Class 10 Science Chapter 1 � Chemical reactions and equations is an outstanding study resource needed for the Class 10th Ncert Chemistry Chapter 2 Date students studying in CBSE Class These NCERT Solutions are crafted as per the latest CBSE syllabus by subject experts at BYJU�S.
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Question 3 Metal compound A reacts with dilute hydrochloric acid to Class 10th Ncert Chemistry Chapter 2 Date produce effervescence. The gas evolved extinguishes a burning candle. Write a balanced chemical equation for the reaction if one of the compounds formed is calcium chloride. Answer: Class 10th Ncert Chemistry Chapter 2 DateClass 10th Ncert Chemistry Chapter 2 Date strong> As the end product is calcium chloride and the gas formed is carbon dioxide, the metal compound A must be calcium carbonate.

Therefore, the Class 10th Ncert Chemistry Chapter 2 Date Class 10th Ncert Chemistry Chapter 2 Date reaction between calcium carbonate and hydrochloric acid is. Question 1 Why do HCl, HNO 3 , etc show acidic characters in aqueous solutions while solutions of compounds like alcohol and glucose do not show acidic character? HCl, HNO 3 , etc. Therefore, alcohol and glucose do not show acidic character. Question 2 Why Class 10th Ncert Chemistry Chapter 2 Date Class 10th Ncert Chemistry Chapter 2 Date does an aqueous solution of an acid conduct electricity?

Answer: The aqueous solution of an acid conducts electricity due to the presence of charged particles 10th Chemistry Chapter Class Date Ncert 2 called ions in it. Question 3 Why does dry HCl gas not change the colour of the dry litmus paper? Question 4 While diluting an Class 10th Ncert Chemistry Chapter 2 Date acid, why is it recommended that the acid should be added to water and not water to the acid?

Answer: While diluting an acid it is Class 10th Ncert Chemistry Chapter 2 Date Class 10th Ncert Chemistry Chapter 2 Date 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.

Answer: When a given amount of an acid is added to water, there is a fixed number of hydronium ions per volume of the solution. On dilution, the number of hydronium ions per volume decreases and concentration decreases. Question 6 Class 10th Ncert Chemistry Chapter 2 Date Class 10th Ncert Chemistry Chapter 2 Date How is the concentration of hydroxide ions OH � affected when excess base is dissolved in a solution of sodium hydroxide? Answer: The concentration of Class 10th Ncert Chemistry Chapter 2 Date Class 10th Ncert Chemistry Chapter 2 Date Class 10th Ncert Chemistry Chapter 2 Date Class 10th Ncert Chemistry Chapter 2 Date hydroxide ions will increase when excess base is dissolved in a solution of sodium hydroxide, but it happens to a limited extent only after which Class 10th Ncert Chemistry Chapter 2 Date the concentration becomes almost constant.

Question 1 You have two solutions A and B. The pH of solution A is 6 and pH of solution B is 8. Which solution has more hydrogen ion concentration?

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 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 far less in number than OH � ions that is Class 10th Ncert Chemistry Chapter 2 Date 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 is Class 10th Ncert Chemistry Chapter 2 Date Class 10th Ncert Chemistry Chapter 2 Date 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 Class 10th Ncert Chemistry Chapter 2 Date compound CaOCl 2? Answer: Bleaching powder. Question 2 Ncert Solutions For Class 10th Geography Chapter 5 Date 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 used for softening hard water. Answer: Sodium carbonate. Question 4 What will happen if a solution of Class 10th Ncert Chemistry Chapter 2 Date Class 10th Ncert Chemistry Chapter 2 Date Class 10th Ncert Chemistry Chapter 2 Date sodium hydrogen carbonate is heated.

Give the equation of the reaction involved? Answer: 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 water. Question 1 A solution turns red litmus Class 10th Ncert Chemistry Chapter 2 Date blue, its pH is likely to be a 1 b 4 c 5 d 10 Answer: d Question 2 A solution reacts with crushed-egg shells Class 10th Ncert Chemistry Chapter 2 Date 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 such as alcohol and glucose also contain hydrogen but are not categorised as acids.

Describe an activity to prove it. The bulb does not 10th Date 2 Class Chemistry Chapter Ncert 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 Class 10th Ncert Chemistry Chapter 2 Date 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 Class 10th Ncert Chemistry Chapter 2 Date 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 do acids not show acidic behaviour Class 10th Ncert Chemistry Chapter 2 Date in the absence of water? The acid produces hydrogen ions only in the presence of water.

So in the absence of water, an acid will not Class 10th Ncert Chemistry Chapter 2 Date 2 Ncert Class Date Chapter Chemistry 10th 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 Class 10th Ncert Chemistry Chapter 2 Date e Weakly alkaline 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 the fizzing occur more vigorously and why?

Answer: Fizzing will occur more vigorously in test tube A. Being Chemistry Ncert 10th Class 2 Chapter Date Class 10th Ncert Chemistry Chapter 2 Date 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 Class 10th Ncert Chemistry Chapter 2 Date in test tube A containing hydrochloric acid. The fizzing is due to the evolution of hydrogen gas which is formed by the action of acid Chapter 2 Chemistry Date Ncert 10th Class on the magnesium metal of magnesium ribbon. Question 11 fresh milk has a pH of 6. How do you think the pH will change as it Class 10th Ncert Chemistry Chapter 2 Date 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 Class 10th Ncert Chemistry Chapter 2 Date Class 10th Ncert Chemistry Chapter 2 Date 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 Class 10th Ncert Chemistry Chapter 2 Date 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 Class 10th Ncert Chemistry Chapter 2 Date 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 Class 10th Ncert Chemistry Chapter 2 Date Class 10th Ncert Chemistry Chapter 2 Date Class 10th Ncert Chemistry Chapter 2 Date of Paris useless after sometime. Question 14 What is a neutralisation reaction? Give two examples. Answer: The reaction between 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 washing soda : Class 10th Ncert Chemistry Chapter 2 Date 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 Class 10th Ncert Chemistry Chapter 2 Date to remove acidity of the stomach. One of them contains distilled water and the other two contain an acidic solution and a basic solution respectively. Solution: Class 10th Ncert Chemistry Chapter 2 Date Class 10th Ncert Chemistry Chapter 2 Date The contents of each test tube 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 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 Class 10th Ncert Chemistry Chapter 2 Date Chapter 2 10th Class Ncert Date Chemistry 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 Class 10th Ncert Chemistry Chapter 2 Date 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 Class 10th Ncert Chemistry Chapter 2 Date 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 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 Chemistry 2 Date Ncert 10th Class Chapter 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, Date Chapter Class Chemistry 2 10th Ncert 2 Ncert Chemistry Chapter Date Class 10th Class 10th Ncert Chemistry Chapter 2 Date why is it recommended that the acid should be added to water and not water to the acid?

Solution: Diluting an acid should be done Class 10th Ncert Chemistry Chapter 2 Date by adding concentrated acid to water gradually with stirring and not by adding water to concentrated acid. The heat is evolved gradually when a concentrated acid Class 10th Ncert Chemistry Chapter 2 Date Class 10th Ncert Chemistry Chapter 2 Date Class 10th Ncert Chemistry Chapter 2 Date 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 Class 10th Ncert Chemistry Chapter 2 Date 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 Class 10th Ncert Chemistry Chapter 2 Date 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: Class 10th Ncert Chemistry Chapter 2 Date Class 10th Ncert Chemistry Chapter 2 Date 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 Class 10th Ncert Chemistry Chapter 2 Date Class 10th Ncert Chemistry Chapter 2 Date 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 Class 10th Ncert Chemistry Chapter 2 Date 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 Class 10th Ncert Chemistry Chapter 2 Date 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 Class 10th Ncert Chemistry Chapter 2 Date Chapter Ncert Date Chemistry Class 2 10th sodium hydro carbonate is heated. By the end of this chapter, you must be able to define the laws that bound solutions.

Such laws with Chapter Class 10th Chemistry Ncert Date 2 derivations will be taught in this chapter which has great importance in the main exam. Go through the examples and then try to solve the exercise Class 10th Ncert Chemistry Chapter 2 Date Ncert Chemistry 2 Class Chapter 10th Date Class 10th Ncert Chemistry Chapter 2 Date questions on your own. Also, solve practice questions and take mock tests on Embibe. Where can I solve Solutions practice questions? Chemistry is an important Class 10th Ncert Chemistry Chapter 2 Date Class 10th Ncert Chemistry Chapter 2 Date Class 10th Ncert Chemistry Chapter 2 Date subject as both engineering and medical aspirants need to prepare for the subject.

If you are preparing for engineering or medical entrance exams, you can Class 10th Ncert Chemistry Chapter 2 Date Class 10th Ncert Chemistry Chapter 2 Date take the free medical and engineering entrance mock tests on Embibe. If you have any queries regarding this article, leave your questions in the comment box Class 10th Ncert Chemistry Chapter 2 Date Class 10th Ncert Chemistry Chapter 2 Date below. We will get back to you as soon as possible. Support: support embibe.

General: info embibe. After some time separation of components stopped and composition of vapour phase became same as that of liquid phase. Both the components started coming in the distillate.

Explain why this happened. Explain why Class 10th Ncert Chemistry Chapter 2 Date Class 10th Ncert Chemistry Chapter 2 Date on addition of 1 mol of NaCl to 1 litre of water, the boiling point of water increases, while addition of 1 mol of methyl alcohol Class 10th Ncert Chemistry Chapter 2 Date to one litre of water decreases its boiling point. Concentration terms such as mass percentage, ppm, mole fraction and molality are independent of temperature, however Class 10th Ncert Chemistry Chapter 2 Date Class 10th Ncert Chemistry Chapter 2 Date molarity is a function of temperature.

Why are aquatic species more comfortable in cold water in comparison to warm water? Why is the vapour pressure Class 10th Ncert Chemistry Chapter 2 Date of an aqueous solution of glucose lower than that of water? How does sprinkling of salt help in clearing the snow covered roads in hilly areas?

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