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Chemical Reactions

Class 10 Science के इस tag से जुड़े questions। हर question के साथ chapter, topic, level और difficulty दी गई है।

ScienceIn a balanced chemical equation, how does the number of oxygen atoms compare on the reactant and product sides?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4EasyScienceWhat type of reaction occurs when aqueous solutions of sodium sulphate and barium chloride are mixed?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4EasyScienceIn which type of reaction is the formation of an insoluble solid on mixing two aqueous solutions a main sign?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4EasyScienceWhat happens to hydrogen in the reaction between copper(II) oxide and hydrogen?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4EasyScienceWhat is the process called when copper is formed by passing hydrogen gas over copper(II) oxide?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4EasyScienceWhy does copper powder turn black when heated in air?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4EasyScienceWhat type of reaction occurs when lead nitrate is heated?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4EasyScienceWhich gas causes the brown fumes when lead nitrate is heated?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4EasyScienceWhy does the blue colour of copper sulphate solution fade when zinc is added?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4EasyScienceWhich substance is deposited on the surface of zinc when it is placed in copper sulphate solution?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4EasyScienceWhy does a displacement reaction not occur when a copper strip is placed in zinc sulphate solution?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4EasyScienceWhat main change occurs when silver bromide is exposed to light?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4EasyScienceWhat is a decomposition reaction caused by light called?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4EasyScienceWhen electric current is passed through water, it decomposes into hydrogen and oxygen. What type of reaction is this?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4EasyScienceWhen limestone, \(\mathrm{CaCO_3}\), is heated, it breaks down into calcium oxide and carbon dioxide. Which type of reaction is this?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4EasyScienceWhat are products in a chemical reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4EasyScienceWhy is a balanced chemical equation necessary?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4EasyScienceWhat is an equation in which the names of reactants and products are written in words called?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3EasyScienceWhat can a change in temperature during a chemical reaction indicate?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3EasyScienceWhen oxygen is added to a substance, what is the process called?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Easy

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