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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।

ScienceWhich pair of products is formed when calcium carbonate is heated?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2Medium ScienceIn the balanced chemical equation for the formation of water, \(2\mathrm{H_2} + \mathrm{O_2} \rightarrow 2\mathrm{H_2O}\), what is the ratio of hydrogen molecules to oxygen molecules?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2Medium ScienceWhen the reaction of magnesium burning in oxygen is balanced, what coefficient is placed before magnesium oxide?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2Medium ScienceIn an experiment, bubbles formed and the container became cold. Which is the most cautious conclusion based on these observations?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1Medium ScienceIn which type of decomposition reaction does light energy help break down a compound?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1Medium ScienceWhen water is added to a coloured solution, its colour becomes lighter, but no new substance is formed. What does this change represent?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1Medium ScienceIn the equation of which type of reaction is writing state symbols such as (aq) and (s) especially useful to show that a solid product has separated from a solution?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1Medium ScienceIf a chemical equation has 2 oxygen atoms on the reactant side and 1 oxygen atom on the product side, what is the equation?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1Medium ScienceIn which type of reaction do the ions of two compounds exchange with each other?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1Medium ScienceWhich method most effectively reduces rancidity in foods containing oils and fats?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1Medium ScienceIn which condition is an iron object most likely to rust?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1Medium ScienceWhat is the correct reason for rubbing and cleaning a magnesium ribbon before burning it?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1Medium ScienceWhich of the following statements about a balanced chemical equation is incorrect?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1Medium ScienceA student says that every colour change is a chemical reaction. What is the correct conclusion?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1Medium ScienceWhich of the following reactions is an example of thermal decomposition?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1Medium ScienceWhich of the following reactions is an example of electrolytic decomposition?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1Medium ScienceWhich of the following reactions is an example of photolytic decomposition?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1Medium ScienceWhich of the following reactions is an example of a double displacement reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1Medium ScienceWhy is photosynthesis considered a chemical reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1Medium ScienceIf the reaction vessel becomes hot during a chemical reaction, which type of reaction does this indicate?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1Medium