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Why should a magnesium ribbon be cleaned before burning in air? To balance a chemical equation, can we change the formula of either reactants or products? (e)Silver bromide is exposed to sunlight? (d)Ammonia and hydrogen chloride are mixed? What type of chemical reactions take place when: Give an example of a chemical reaction characterized the change in temperature. Write a balanced equation for this reaction. Potassium chlorate (KCIO 3) on heating forms potassium chloride and oxygen. Why is photosynthesis considered as an endothermic reaction? Why does the color of copper sulphate solution change, when an iron nail is dipped in it? Write the chemical equation and name the reaction when a solution of sodium chloride is mixed with a solution of silver nitrate and a white precipitate of silver chloride is formed.
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What happens when sodium reacts with water? What is a decomposition reaction ? Give example. What are the different types of reactions?
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Can a combination reaction be redox reaction. Write a chemical equation when magnesium metal reacts with aqueous hydrochloric acid to produce a solution of magnesium chloride and hydrogen gas. Very Short Answer Questions:- Question 1. Hope you like them and do not forget to like and share the page.įill in the blanks:- 1.Addition of hydrogen in a substance in a reaction is known as_ reaction.Ģ.In a _ reaction two or more substances combine to form a new single substance.ģ.Unbalanced reactions are also known as _Ĥ.Reactions in which heat is given out along with the products are called _- reactions.ĥ.Reactions in which energy is absorbed are known as _ reactions.Ħ.When as element displaces another element from its compound, a _ reaction occurs.ħ.Those reactions, in which two compounds react by an exchange of ions to form two new compounds, are called _ reactionsĨ.Precipitation reactions produce _ salts.ĩ.Reduction is the _ of oxygen or gain of hydrogen.ġ0.The digestion of food in the body is an example of _ reaction.ġ1.The addition of oxygen to a substance is called _.ġ2.When calcium carbonate is heated, it decomposes to give_ and _. In this page we have chemical reactions and equations class 10 worksheet with answers.