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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।

ScienceWhat does a downward arrow (↓) indicate in a chemical equation?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Easy ScienceWhat does an upward arrow indicate in a chemical reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Easy ScienceWhich symbol represents the liquid state of a substance in a chemical equation?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Easy ScienceWhich symbol represents the state of a substance dissolved in water in a chemical equation?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Easy ScienceFilling potato chips packets with nitrogen gas reduces which problem?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Easy ScienceWhy is food kept in airtight containers to reduce rancidity?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Easy ScienceRancidity is mainly caused by what?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Easy ScienceRusting of iron is closely related to which process?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Easy ScienceWhat is the method of preventing rust by coating iron with zinc called?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Easy ScienceWhy is a coat of paint applied to iron to prevent rusting?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Easy ScienceWhat can a change in smell show in a chemical reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Easy ScienceIf bubbles are observed during a chemical reaction, what do they usually indicate?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Easy ScienceWhich gas is generally necessary for a combustion reaction in air?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Easy ScienceDecomposition reactions in which energy must be supplied are generally of which type?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Easy ScienceA large amount of heat is released when water is added to calcium oxide. What type of reaction is this?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Easy ScienceWhat is the nature of the white powder formed when magnesium burns?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Easy ScienceWhy is melting of ice not a chemical reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Easy ScienceCooking of rice is which type of change?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Easy ScienceWhen a candle is lit, what type of change mainly occurs in the combustion of wax vapour?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Easy ScienceDigestion of food is considered which type of change?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Easy