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Chemical Equations

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

ScienceWhich of the following reactions is an example of a double displacement reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1MediumScienceWhy is photosynthesis considered a chemical reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1MediumScienceWhat is the correct meaning of upward and downward arrows in a chemical equation?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1MediumScienceAccording to the law of conservation of mass, how should the number of atoms of each element compare on the reactant and product sides of a balanced chemical equation?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1MediumScienceA white sample of silver chloride turns grey when kept in sunlight. Which equation correctly represents this change?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1MediumScienceWhile heating lead nitrate, a student identified the evolved brown gas as oxygen. What is the correct correction to the student's statement?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1MediumScienceWhich is the balanced chemical equation for the reaction in which hydrogen and oxygen form water?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1MediumScienceWhich observation provides the best evidence that a chemical reaction has occurred in an experiment?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 7EasyScienceA student wrote \(Mg + O_2 \rightarrow MgO\) for the burning of magnesium in oxygen and claimed that it is balanced. Which is the correct balanced equation?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 7EasyScienceWhat does a downward arrow show in a chemical equation?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 7EasyScienceWhat does an upward arrow  written with a product in a chemical equation indicate?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 7EasyScienceWhich symbol represents an aqueous solution in a chemical equation?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 7EasyScienceWhich symbol shows the gaseous state in a chemical equation?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 7EasyScienceWhich symbol shows the liquid state in a chemical equation?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 7EasyScienceWhich of the following equations represents an exothermic reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 7EasyScienceWhat type of reaction occurs when water is added to quicklime, CaO, to form calcium hydroxide?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 7EasyScienceWhat is a reaction called in which a single compound breaks down into two or more simpler substances?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 7EasyScienceWhat is the reaction called in which a compound breaks down into two or more simpler substances?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 7EasyScienceWhere are coefficients placed while balancing a chemical equation?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 7EasyScienceWhy is a chemical equation more useful than a word equation?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 7Easy