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ncert class 8 history worksheets with answers

Going through the step-wise solutions for every question too is highly important to bag a good score. Also in this article, you will find the Step-wise explanation for each and every question. Going through them will help necrt in getting a better understanding of how clazs solve problems.

Question 1 You have been provided with three test tubes. One of them contains distilled water and the other two contain an acidic solution and a basic solution, respectively.

If you are given only red litmus paper, how will you identify the contents of each test tube? Answer: i Put the red litmus paper in all the test tubes, turn by turn. The solution which turns red litmus to blue will be a basic solution.

The blue litmus paper formed here can now be used to test the acidic solution. The solution which turns the blue solugions paper to red will be the acidic class 10th history chapter 2 ncert solutions australia. Question 1 Why should curd and sour substances not be cass in brass and copper vessels?

Answer: Curd and sour substances should not be kept in brass and copper vessels because these and other sour food-stuffs contain acids which can react with the metal of the vessel to form poisonous metal compounds which can cause xustralia poisoning and affect our health adversely.

Question 2 Which gas is usually liberated when an acid class 10th history chapter 2 ncert solutions australia with a metal? Illustrate with an example. How will you test for the presence of this gas?

Answer: i Hydrogen H 2 gas is liberated when an acid reacts with a metal. Take some zinc granules in the test tube. Add about 5 mL dilute hydrochloric acid slowly. Soon the reaction between zinc and hydrochloric acid starts and hydrogen gas is evolved. When passed through soap solution, solutioms gets trapped into bubbles. Bring a burning candle near chaptr soap bubble filled with gas.

The ncery bubble bursts and hydrogen gas burns with a pop sound. Question 3 Metal compound A reacts with dilute hydrochloric acid to 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: As the end product is calcium chapyer and the gas formed is carbon dioxide, the metal compound A must be calcium carbonate.

Therefore, the reaction between calcium carbonate austrapia hydrochloric acid is. Question 1 Why do HCl, HNO 3etc show acidic characters in aqueous mcert while solutions of compounds like alcohol and glucose do not show acidic character? HCl, HNO 3. Therefore, alcohol and glucose do not show acidic character.

Question 2 Why does an aqueous solution of an acid conduct electricity? Answer: The aqueous solution of an acid conducts electricity auetralia to the presence of charged particles called ions in it. Question 3 Why does dry HCl histoy not change the colour of the dry litmus paper? Question 4 While diluting hiatory 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 recommended that the acid should be added to water and not water to the acid because if water is added to Ncert Solutions For Class 10th History Chapter 4 Full concentrated acid to dilute it, then a large amount of heat is evolved at. Answer: When a given amount of an acid is added to water, there is a fixed number of hydronium ions per volume of aistralia solution. On dilution, the number of hydronium ions per volume decreases and concentration decreases.

Question 6 How is the concentration of hydroxide ions OH � affected when excess base is dissolved in a solution of sodium hydroxide? Answer: The concentration of 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 the concentration becomes almost class 10th history chapter 2 ncert solutions australia. 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 � class 10th history chapter 2 ncert solutions australia that is solutios for their basic nature. Question 4 Under what soil condition do you think a farmer audtralia 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 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 CaOCl 2? 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 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: Solution of sodium hydrogen carbonate on heating gives sodium carbonate and carbon dioxide gas is evolved. Question 5 Write an equation class 10th history chapter 2 ncert solutions australia show the reaction between plaster of Paris and water.

Question 1 A solution autralia red litmus 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 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 class 10th history chapter 2 ncert solutions australia 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. This shows that alcohols and glucose are not acids. Question chappter Why does distilled water not cjapter 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 capter, 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 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 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 Hjstory alkaline Arrange the pH in increasing order of hydrogen ion concentration.

Question 10 Equal lengths australiia 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 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 gas which is formed by the action of acid ncerrt the magnesium metal of magnesium ribbon. Question 11 fresh milk has a pH of 6. How clsss you necrt the pH will change as it turns into curd? Explain your answer.

Answer: pH of milk falls below 6 as it class 10th history chapter 2 ncert solutions australia into curd due to the formation of lactic acid during this process.

Lactic histofy 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 class 10th history chapter 2 ncert solutions australia to the formation of lactic acid in it.

Question 13 Plaster of Paris should be stored in a nceet proof 10hh. Explain solutiions 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 austrslia hydration. This will make the plaster of Paris useless after. 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 : 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 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 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.

Thus:

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Question Do Sam was a Colonel in the: a US artillery regiment. Nationalism in Vietnam emerged: a Through the efforts of one society only to fight against the French.

Answer: c T the efforts of different sections of society to fight against the French. Nationalism in Vietnam emerged through the efforts of different sections of society to fight against the French.

Answer: c In , after the French assumed control of Tonkin and Anaam. It was formed in , after the French assumed control of Tonkin and Anaam. The first link with Yunan in China was completed in: a b c d The colonial economy in Vietnam was primarily based on: a Rice cultivation and jute plantation. Answer: c Rice cultivation and rubber plantation. It was based on rice cultivation and rubber plantation.

The French needed an educated local labour force: a To be loyal to them b To understand them better c But they feared that education might create problems. Vietnamese may not convert into Christians.

Answer: c But they feared that education might create problems. The French needed an educated local labour force but they feared that education might create problems. In , in a population of 17 million: a there were less than who passed the examination. Answer: b There were less than who passed the examination. There were less than who passed the examination. Answer: a To provide a Western-style education.

It was started to provide a Western-style education. Schools in Vietnam became an: a Important place for education. Mazzini is known for his noble efforts to achieve the unification of Italy.

He inspired the youths of not only Italy but of whole Europe to fight for freedom. What do you know about Garibaldi? Garibaldi is known as the physical force or the Sword of Italy. He, with Mazzini launched the young Italy movement for the unification of Italy. He involved The Sardinian sailors to Revolt in A. Give feedback and suggestions to improve the contents of this website so that more and more students can take advantage of these free contents.

Revision Books and study material in Hindi and English Medium is also available to free download. How many chapters are there in History for Class 10? What are the learning objectives of Chapter 2 � Nationalism in India? What are the learning objectives of Chapter 4 � The Age of Industrialisation? This was a successful war of independence waged by Greek revolutionaries between and against the Ottoman Empire.

The Greeks were supported by the West European countries, while poets and artists hailed Greece as the cradle of European civilisation. Finally, the Treaty of Constantinople of recognised Greece as an independent nation. Briefly trace the process of German unification. The process of German unification was continued by Prussia after the defeat of the liberal, middle-class Germans at the hands of the aristocrats and the military in Its chief minister Otto von Bismarck carried out this process with the help of the Prussian army and bureaucracy.

Over seven years, Prussia fought three wars with Austria, Denmark and France. These wars culminated in Prussian victory and German unification. How was the history of nationalism in Britain unlike the rest of Europe? The history of nationalism in Britain was unlike that in the rest of Europe in the sense that it was forced down upon the masses.

There was no concept of a Ncert Solutions Class 10th History Chapter 3 Table British nation prior to the eighteenth century. The region was in fact inhabited by different ethnic groups English, Welsh, Scot, Irish. Each group had its own cultural and political tradition. However, as the English state grew in terms of wealth, importance and power, it was able to extend its influence over the other states of the islands.

The English parliament, which had seized power from the monarchy, played a crucial role in doing away with the ethnic distinctions and uniting the different groups into a British nation-state, with England at its centre. The ethnic nationalities were, directly or indirectly, forced to join the English state to form the Ncert Solutions Class 10th History Chapter 1 Chem United Kingdom of Great Britain. The symbols of new Britain�the British flag, the national anthem and the English language were widely popularised, while the distinctive identities of the other joining states were systematically suppressed.

English culture dominated the British nation, while the other states became mere subsidiaries in the Union. Why Indians were outraged by the Rowlatt Act. It gave the government autocratic powers to repress political activities besides allowing it to detain political prisoners without a trial, for two years.

Abindra nath Tagore 2. Emphasis on the power of Truth. Bankim Chandra 4. Baba Ramchandra 6. Focus on product which was prepared in own country. Mumbai 8. To curb the Arousing spirit of Nationalism. The Folklore of Southern India Under this act political prisoners could be kept in jail for two years without trial.

In Bankim Chandra composed Vande Matram. In , Congress was formed in Mumbai. Banerjee chaired the first meeting of Congress. In , Lord Curzon proposed the division of Bengal. In , Congress was divided into extremists and moderate. In , Delhi Durbar was organized. Bengal Division was abolished in Delhi Durbar. In , First World War started.

In , Mahatama Gandhi returned to India. The British Government turned down the demand of Self-rule of Indian. In , British Government gave Rawlatt Act. In , Mahatama Gandhi started noncooperation movement. In , Mahatma Gandhi withdrew the non-cooperation movement after the violence took place at Chauri-chaura. In , Simon Commission came to India. Lala Lajpart Rai was killed while protesting.

In , Dr. Ambedkar organized Scheduled caste into depressed Classes Association. In Gandhi-Irwin pact was signed and Civil disobedience movement was suspended. In , Mahatma Gandhi participated in Second round table conference but did not get expected success. In , Choudhary Rahmat Ali first coined the idea of Pakistan. In , Indian Government Act was passed and regional government was formed.

In , the Quit India movement was started by Mahatma Gandhi. He gave the slogan Do or Die. In , Cabinet Mission came to India with the proposal of constituent assembly. Ask your doubts and share your knowledge through Discussion Forum. What were the reasons for starting the Khilafat Movement?

How did the First World War help in the growth of nationalist movement in India? Who was Alluri Sitaram Raju? Explain his role in inspiring the rebels with Gandhijis ideas? Discuss the role of women in the Civil Disobedience Movement? C Banerjee. Khilafat Movement. Important Questions on Class 10 History Chapter 2 Why growth of nationalism in the colonies is linked to an anti-colonial movement. The sense of oppression and exploitation became a common bond for people from different walks of life, and this resulted in the growth of nationalist ideals.

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