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Which of the following is not a physical change? Which of the following statements about the given reaction are correct? Which of the following are exothermic processes? Three beakers labelled as A, B and C each containing 25 mL of water were taken. It was observed that there was an increase in the temperature of the solutions contained in beakers A and B, whereas in case of beaker C, the temperature of the solution falls. Which one of the following statement s is are correct?

A dilute ferrous sulphate solution was gradually added to the beaker containing acidified permanganate solution. The light purple colour of the solution fades and finally disappears. Which of the following is the correct explanation for the observation? Which sciennce the following is are double displacement reaction s? Which among the following statement s is are true? Exposure of silver boat excursion while 45 to sunlight 10gh a long duration turns grey due to i the formation of silver by decomposition of silver chloride ii sublimation of silver chloride iii decomposition of chlorine gas from silver chloride iv oxidation of silver chloride a i only b i and iii c ii and iii d iv.

Solid calcium oxide reacts ncert exemplar class 10th science pdf pdf exempoar water to form calcium hydroxide accompanied by liberation of heat. This process is called slaking of lime. Calcium hydroxide dissolves boat excursion while 45 water to form its solution scoence lime boat excursion while 45. Which among the following is are true about slaking of lime and the solution formed?

Barium chloride pdc reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the following correctly represents the type of the reaction ncert exemplar class 10th science pdf pdf Electrolysis of water is a decomposition reaction.

The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is a b c d Which of the following is are an endothermic process es?

In the double displacement reaction between aqueous potassium iodide and aqueous lead nitrate, a yellow precipitate of lead iodide is formed. While performing the activity if lead nitrate is not available, which of the following can be used in place sscience lead nitrate? Which of the following gases can be used for storage of fresh sample of an oil for a long time?

The following reaction is used for the preparation of oxygen gas in the laboratory. Which of the following statement s is are correct about the reaction? Which one of the following processes involve chemical reactions? In which of the following chemical equations, the abbreviations represent the correct states of the reactants and products involved at reaction temperature? Write the balanced chemical equations for the following reactions and identify the type of reaction in each case.

Which ncrt the following changes are exother mic or endothermic in nature? Write the balanced chemical equations for the following reactions a Sodium carbonate on reaction with hydrochloric acid in equal molar concentrations gives sodium chloride and sodium hydrogencarbonate.

A solution of potassium chloride when mixed with silver nitrate solution, an insoluble white substance is formed. Write the chemical reaction involved and also mention the type of the chemical reaction? Ferrous sulphate decomposes with the evolution of a Class 10th Ncert Exemplar Pdf Upload gas having a characteristic odour of burning sulphur. Write the chemical reaction involved and identify the type of reaction.

Why do fire flies glow at night? Grapes hanging on the plant do not ferment but after being plucked from the plant can be fermented. Under what conditions do these grapes ferment? Is it a chemical or a physical change? Which among the following are physical or chemical changes? During the reaction of some metals with dilute hydrochloric acid, following observations were. Explain these observations giving suitable reasons. A substance X, which is an oxide of a group 2 element, is used intensively in the cement industry.

This element is present in bones. On treatment with water it forms a solution which turns red litmus blue. Identify X and also write the chemical reactions involved. Write a balanced chemical equation for each of the following reactions and also classify. Balance the following chemical equations and identify Ncert Book Of Class 10th Science Pdf To Pdf the type of chemical reaction. A magnesium ribbon is burnt in oxygen to give a white compound X accompanied by emission of light. If the burning ribbon is now placed in an atmosphere of nitrogen, it continues to burn and forms a compound Y.

Zinc liberates hydrogen gas when reacted with dilute hydrochloric acid, whereas copper does not. Explain why? A silver article generally turns black when kept in the open for a few days.

The article when rubbed with toothpaste again starts shining. Name the phenomenon involved. On heating exemplag coloured powder of copper II nitrate in a boiling tube, copper oxide blackoxygen gas and a brown gas X is formed a Write ncert exemplar class 10th science pdf pdf balanced chemical equation of the reaction.

What happens when a piece of boat excursion while 45 zinc metal is added to copper sulphate solution? Also, write the balanced chemical equation if the reaction occurs.

On adding a drop of barium chloride solution to an aqueous solution of sodium sulphite, white precipitate is obtained. You are provided with two containers made up of copper and aluminium. In which of the above containers these solutions can be kept? What happens when a solution of an acid is mixed with a solution of a base in a test tube?

An Class 10th Ncert Exemplar Pdf Quiz aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the sciencee During the preparation of hydrogen chloride gas on a humid day, the boat excursion while 45 is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to sciecne absorb the evolved gas b moisten the gas c absorb moisture from the gas d absorb Cl� ions from the evolved gas.

Which of the following salts does not ncert exemplar class 10th science pdf pdf water of crystallisation? Sodium carbonate is a basic salt because it is a salt of a strong acid and strong base b weak acid and weak base c strong acid and weak base d weak acid and strong base 6.

Calcium phosphate is present in tooth enamel. Its nature is a basic b acidic c neutral d amphoteric 7. A sample of soil is mixed with ncert exemplar class 10th science pdf pdf and allowed to settle. The clear supernatant solution turns the pH paper yellowish-orange. Which of the following would change the colour of this pH paper to greenish-blue? Which of the following gives the correct increasing order of acidic strength?

If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done? Sodium hydrogencarbonate when added to acetic acid evolves a gas. Which of the following statements are true about the gas evolved? Common salt besides being used in kitchen can also clsas used as the raw material for making i washing soda ii bleaching powder iii baking soda iv slaked lime a i and ii b iii and iv c i and iii d iiii and iv One of the constituents of baking powder is sodium hydrogencarbonate, the other constituent is a hydrochloric acid b tartaric acid c acetic acid d sulphuric acid To protect tooth decay we are advised to jcert our teeth regularly.

The nature boat excursion while 45 the odf paste commonly used is a acidic b neutral c basic d corrosive Which of the following statements is correct about an aqueous solution of an acid and exejplar a base? The pH of the gastric juices released during digestion is a less than 7 b more than 7 c equal boat excursion while 45 7 d equal to 0 Which of the following phenomena occur, when a small amount of acid is added to water?

Which one of the following can be used as an acid�base indicator by a visually impared student? Which of the following substance will not give carbon dioxide on treatment with dilute acid? Which of the following is acidic in nature? In an attempt to demonstrate electrical conductivity Switch through an electrolyte, the following apparatus Figure ncetr. Which among the ncert exemplar class 10th science pdf pdf statement ncert exemplar class 10th science pdf pdf is are Beaker correct?

Which of the following is used for dissolution of gold? Which of the following is not a mineral acid? Which among the following is not a base? Which of the following statements is not correct? Match the chemical substances given in Column A with their appropriate application given in Column B.

B Baking soda ii Production of H2 and Cl2. Equal volumes of hydrochloric acid and sodium hydroxide solutions of same concentration are mixed and the pH of the resulting solution is checked with a pH paper. What would be the colour obtained? You may use colour guide given in Figure 2. Which of the following is are true when HCl g is passed through water?

Hormones produced in one part of an organism move to another part to achieve the desired effect. In human beings, the transport of materials such as oxygen, carbon dioxide, food and excretory products is a function of the circulatory system. Science Exemplar contains various types of questions. Explain the keywords of Chapter 6: Life Processes. If the coil is placed near to a current-carrying conductor, the magnetic field may change either due to a change in the current through the conductor or due to the relative motion between the coil and conductor. Discussion forum is being maintained to discussion the doubts of users in educations. Movement of various types can be taken as an indication of life.

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