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Class10

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 equations represents a double displacement reaction that forms a precipitate?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3MediumScienceWhich pair shows oxidation first and reduction second?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3EasyScienceIn a chemical reaction, oxygen is removed from substance A and the same oxygen is added to substance B. What is the most appropriate classification of this reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3MediumScienceIf copper oxide becomes copper in the reaction with hydrogen, what change has occurred?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3EasyScienceWhen a precipitation reaction occurs on mixing two aqueous solutions, what is its clearest visible evidence?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3EasyScienceMetal A displaces metal B from a solution of its salt, and metal B displaces metal C from a solution of its salt. What is the correct order of reactivity of the metals?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3MediumScienceWhen an iron nail is placed in copper sulphate solution, a decrease in the concentration of which ion causes the blue colour of the solution to fade?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3HardScienceIn the electrolysis of water, if the volume of oxygen is five millilitres, what is the expected volume of hydrogen?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3MediumScienceWhat is the deeper reason for keeping silver bromide in a dark coloured bottle?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3MediumScienceWhite silver chloride turns grey in sunlight. What type of reaction occurs, and which product causes the grey colour?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3HardScienceOn heating lead nitrate, the evolution of a brown gas confirms the formation of which gas?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3HardScienceWhen lead nitrate is heated, a brown gas evolves and a solid residue remains. Which explanation is correct?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3HardScienceWhat is the role of heat in thermal decomposition of calcium carbonate?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3MediumScienceWhen water is added to calcium oxide, calcium hydroxide is formed and the container becomes hot. Which two types of reaction does this represent?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3HardScienceWhich statement best explains the relationship between a balanced chemical equation and the law of conservation of mass?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3HardScienceIn which condition can conservation of mass be checked most correctly?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2MediumScienceWhen 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 change is the clearest indication that a chemical reaction has occurred?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2HardScienceWhich 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 2Easy