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Chemical Reactions And Equations

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

ScienceWhen an iron nail is placed in a blue copper sulphate solution, which observation identifies that a displacement reaction has occurred?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2MediumScienceWhich of the following correctly matches a state symbol with the state of a substance?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2EasyScienceIf an upward arrow ↑ is written after a product in a chemical equation, which observation does it indicate?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2EasyScienceA product written with a downward arrow in a chemical equation will have which property?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2EasyScienceDuring a chemical reaction, which observation indicates that it is endothermic?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2MediumScienceWhy are antioxidants useful in foods containing oils and fats?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2MediumScienceHow does filling nitrogen in chips packets affect the role of oxygen?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2MediumScienceWhich of the following reactions involves both oxidation and reduction occurring simultaneously?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2MediumScienceIn which situation will a substance be reduced?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2EasyScienceWhy is the conversion of copper oxide into copper called reduction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2EasyScienceIn the reaction CuO + H₂ → Cu + H₂O, the formation of water proves the oxidation of which substance?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2MediumScienceWhy is the use of silver bromide in photography possible?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1MediumScienceWhen calcium carbonate is heated, the gas produced turns limewater milky. Which gas is it?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1MediumScienceIn an unbalanced equation, oxygen atoms are fewer on the right side. What is the most correct method during balancing?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1EasyScienceTen grams of calcium carbonate is heated in a closed container. If no gas escapes, what will be the total mass of the products?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1MediumScienceDuring an unknown process in a closed container, the properties of a substance changed, a new substance was formed, and the total mass remained unchanged. What is the most appropriate conclusion?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1MediumScienceWhich option correctly states the position of reactants and products in a chemical equation?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1EasyScienceIn a chemical equation, in which situation is the symbol (aq) correctly used?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1EasyScienceWhich option gives the correct meaning of upward and downward arrows in a chemical equation?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1EasyScienceIf a white insoluble solid forms in a solution but the temperature does not change, what is the correct conclusion?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1Medium