Ncert Solutions Class 10th Acids Bases And Salts Service,Wooden Sailing Dinghy For Sale Victoria Ed,Most Expensive Pontoon Boats 2020 Army - Plans On 2021
26.10.2020This chapter will help you understand the basic concepts of acids, bases, and salts. Learn different characteristics of acids, bases, and salts about the reaction with other chemical elements. There are fifteen questions in the exercise of this chapter. Swiflearn will provide its detailed solution that will help in tackling difficult questions easily.
Solution 1: Let us mark the three test tubes as A, B, and C put the given red litmus paper in each solution. If the colour of red litmus paper changes to blue suppose in test tube A , then it is a base and if there is no colour change, then it is either acidic or neutral.
Now, a drop of the solution from test tube A is put on the red litmus paper. Same process is repeated with solution B and C. Out of the remaining two A and C , anyone can be acidic or neutral. Now a drop of basic solution is mixed with a drop of each of the remaining other two solutions separately and then check the nature of the drops of the obtained mixtures.
If the colour of red litmus turns blue, then the second solution is 10th Class Ncert Hindi Book Sanchayan Solutions Service neutral C and if there is no change in colour, then in that case, the second solution is acidic A. This is because of the property that acidic and basic solutions neutralise each other. In this way we can identify the contents of each test tube. Solution 1: The acids are sour in taste. Thus, curd and other sour substances contain acids. When they are kept in brass and copper vessels, the metal of the vessel reacts with the acid present in sour substances and the curd to liberate hydrogen gas and harmful products which spoil the food.
Solution 2: On reaction of an acid with a metal, hydrogen gas is usually liberated. Solution 3: The balanced chemical equation for the reaction: Calcium carbonate hydrochloric acid Calcium chloride Carbon dioxide Water.
Although aqueous solutions of glucose and alcohol contain hydrogen, these cannot dissociate in water to form hydrogen ions. Therefore, they do not show acidic character. Refer pdf. Solution 2: In aqueous solution, acid dissociates into ions which are responsible for conduction of electricity. Only in aqueous solution an acid dissociates to give ions. The litmus paper colour is changed by the hydrogen ions. In this case, neither HCl is in the aqueous form nor the litmus paper is wet, hence, the litmus paper colour does not change.
Solution 4: It is always recommended that acid should be added to water, because the process of dissolving an acid in water is exothermic. If the reverse process is done, then due to generation of large amount of heat, the mixture splashes out and causes burns. This may cause accident. Solution 4: If the soil is acidic which is improper for cultivation, then to increase the basicity of soil, the farmer would treat the soil with quick lime or slaked lime or chalk.
Solution 2: The compound is calcium hydroxide [Ca OH 2], which on treatment with chlorine, yields bleaching powder. Solution 3: Washing soda Na2CO3. Solution 4: When a solution of sodium hydro carbonate or sodium hydrogen carbonate is heated, sodium carbonate and water are formed with the evolution of carbon dioxide gas. Solution 5: The chemical equation can be represented as: 4 2 2 4 2 1 3.
Solution 1: d Bases turn red litmus blue. Since, the solution turns red litmus blue, its pH would likely to be Solution 2: b The solution contains HCl which reacts with crushed egg-shells to give a gas that turns lime-water milky. Observations : The bulb glows in the HCl solution and does not glow in the glucose or alcohol solution. These ions conduct electricity in the solution resulting in the glowing of the bulb.
On the other hand, the glucose solution does not dissociate into ions. Therefore, the bulb does not glow. Conclusion : All acids contain hydrogen but not all compounds containing hydrogen are acids. So, alcohols and glucose contain hydrogen, but they are not categorised as acids. Solution 7: Distilled water is a pure form of water which contains no ionic species. Therefore, it does not conduct electricity. Rain water is an impure form of water, contains many ionic species acids and thus, it conducts electricity.
Solution 8: Acids can only dissociate in aqueous solution to from hydrogen ions which are responsible for the acidic behaviour. Acids do not show acidic behaviour in the absence of water because the dissociation of hydrogen ions from an acid occurs in the presence of water only. Solution The fizzing occurs strongly in test tube A, in which hydrochloric acid HCl is added. Therefore, HCl produces hydrogen gas at a faster rate due to which fizzing occurs.
Solution The pH of fresh milk is 6. As it changes into curd, the pH will decrease because curd contains lactic acid which reduces the pH. Solution a In alkaline condition, milk does not set as curd easily due to the formation of lactic acid. Thus, it takes a longer time for the curd to set. Solution Plaster of Paris POP should be stored in a moisture-proof container because it is a powdery mass, absorbs water or moisture to form a hard solid mass known as gypsum.
Gypsum Hard solid Plaster of Paris Water 4 2 2 4 2 1 3. Solution Neutralisation reaction: A reaction in which an acid and base react with each other to give a salt and water. Base Acid Salt Water. The antacid neutralises the excess of acids and thus gives relief from indigestion. Solution Uses of washing soda: a It is used to remove permanent hardness of water. Uses of baking soda: a It is used baking powder. Baking powder is a mixture of baking soda and tartaric acid.
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