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NCERT Solutions for Class 10 Science Chapter 2 Acids, Bases and Salts - Free PDF

Offline Apps are also in updated format free to download. Indicators are substances which give different colour mcert ncert solutions of class 10th chemistry chapter 2 review or bases solutions. Natural ncert solutions of class 10th chemistry chapter 2 review from plants are: a Litmus, b Vanilla extract. Antacids are mild alkalies. These are used for getting relief from acidity and indigestion and sometimes, even headache.

When taken orally, it reacts with hydrochloric acid present in the stomach and reduces its strength by consuming some of it. For example, milk of magnesia is an antacid. Olfactory indicators are substances which have different odour in acid and ncert solutions of class 10th chemistry chapter 2 review solutions. For example, vanilla aolutions has characteristics pleasant smell in acid solution and no smell xhemistry alkali solution.

Tap water contains Lorem lpsum 362 boatplans/bass-boat-sale/nitro-z20-bass-boat-for-sale-in-malaysia http://myboat362 boatplans/bass-boat-sale/nitro-z20-bass-boat-for-sale-in-malaysia.html impurities in the forms of salts.

Due to presence of salts, it conducts electricity. Distilled water is free from all kinds of salts and hence does not conduct electricity. When an acid is mixed with water, there is evolution of large amount of heat. Therefore, acid is slowly added to water. If on the other hand, water is added to acid, it might spill on your body and clothes due to explosion and evolution of sudden and large amount of heat. The rain water collected from city B is more acidic.

Sugar present in chocolates and sweets o broken to acids by bacteria present in the mouth. This lowers the pH in the mouth. Tooth enamel is made up of calcium phosphate, which gets corroded when the pH in the mouth is below 5. To prevent tooth enamel from decay, toothpaste is used because it is alkaline and neutralises the acid produced in the mouth and helps Class 10th Chemistry Chapter 5 Ncert Solutions Llc to prevent lowering of pH in mouth.

Bleaching powder is soluble in water. However, commercial samples of bleaching powder contains slaked lime that does not react with chlorine gas during the manufacture of bleaching powder.

The insoluble part of bleaching powder is this white solid, i. Question vhemistry What is a neutralization reaction? Give some examples. Answer 1: When the effect of a base is nullified by an acid and vice versa, it is called neutralization reaction.

Question sklutions An alkali is an important base used for the laboratory work. Name the base and state how it can be prepared from common salt? What is this process called? Answer 2: An important alkali ov needed for laboratory work is sodium hydroxide. It can be prepared from sodium chloride by the process of electrolysis. This is called chlor-alkali process.

Electrolysis of aqueous solution of sodium chloride: When electricity is passed through an aqueous solution of sodium chloride commonly called brine, it decomposes into chloride and sodium. Sodium is collected at the cathode where it reacts with water to form sodium hydroxide. Chlorine is formed at the anode and is collected as a gas. Question 1: a How does baking soda helps to make cakes and bread soft and spongy?

OR Give reason: Lorem lpsum 362 boatplans/bass-boat-sale/bass-boat-for-sale-lake-havasu-city-video more info rise on adding baking powder. Answer 1: a On heatingncert solutions of class 10th chemistry chapter 2 review bicarbonate decomposes to produce carbon dioxide. This causes biscuits and cakes. The other constituents act as preservatives.

Question 2: Why does bleaching powder smell strongly of chlorine? Answer 2: Bleaching powder smells strongly of chlorine because it slowly reacts with carbon dioxide of air to evolve chlorine gas. Define indicators. Name two natural indicators obtained from plants. What are antacids? What are olfactory indicators? Give an example. Tap water conducts electricity whereas distilled water chaptr not. While diluting an acid, why is it recommended that the acid should be added to water and ncert solutions of class 10th chemistry chapter 2 review water into the acid?

What is meant by the term pH of a solution? The pH of rain water collected from two cities A and B was found to be 6 and 5 respectively.

The water of which city is more acidic? Tooth enamel is one of the hardest substance in our body. How does it undergo damage due to eating chocolates and sweets? What should we do to prevent it? Why revjew commercial samples of bleaching powder not completely soluble in water? Important Questions on 10th Science Chapter 2 Define indicators. What is a neutralization reaction? When the effect of a base is nullified by an acid and vice ncert solutions of class 10th chemistry chapter 2 review, it is called neutralization reaction.

Why does distilled water not conduct electricity, whereas rain water does? Distilled water is ncert solutions of class 10th chemistry chapter 2 review pure Lorem lpsum 362 boatplans/diy/diy-fly-fishing-boat-2021 this web page of water not containing any ionic species.

Therefore, it does not conduct electricity. Rain water, being an impure form of water, contains many ionic species dissolved Lorem lpsum 362 boatplans/fishing-boat/the-fishing-boat-bristol here air such as acids and therefore it conducts electricity. Why do acids not show acidic behaviour in the absence of water? Fresh milk has a pH of 6. How do you think the pH will change as it turns into curd? Explain your answer.

The pH of milk is 6. As it changes to curd, the pH will reduce because curd is acidic in nature. The acids present in it decrease the pH. Why does an aqueous solution of an acid conduct electricity? Acids dissociate in aqueous solutions to form ions. These ions are responsible for conduction of electricity. Why does dry HCl gas not change the colour of the dry litmus paper? Colour of the litmus paper is changed by the hydrogen ions. It Lorem lpsum 362 boatplans/small-boats/center-console-boats-small-3d center console small 3d only in the aqueous solution that an acid dissociates to give ions.

Since in this case, neither HCl is Lorem lpsum 362 boatplans/aluminum-boats/ranger-aluminum-center-console-boats-for-sale-in-malaysia �������� ranger aluminum center console boats for sale in malaysia ������� the aqueous form nor the litmus paper is wet, therefore, the colour of the litmus paper does not change.

While diluting an acid, why is it recommended that the acid should be added to water and not water to the acid? The process of dissolving an acid or a base in water is a highly exothermic one. Care must be Lorem lpsum 362 boatplans/fishing-boat/fishing-boat-hire-whitsundays-4th fishing boat hire whitsundays while mixing concentrated nitric acid or sulphuric acid with water.

The acid must always be added cclass to water with constant stirring. If water is added to a concentrated acid, the heat generated may cause the mixture to Lorem lpsum 362 boatplans/fishing-boats-sale/flats-fishing-boats-for-sale-philippines just click for source out and cause burns. The glass container may also break due to excessive local heating.

Chapter 3: Metals and Non-Metals �.

If it emits strongly at nm, calculate a the frequency of emission,. 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. 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. Answer briefly. 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 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?
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