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Class 10 Science

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

ScienceMetal A is less reactive than metal B. What will happen when metal A is placed in the salt solution of metal B?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Expert ScienceFading of blue colour of copper sulphate solution is linked with decrease of which ion?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Expert ScienceAt which electrode is the gas with lower volume formed during electrolysis of water?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Expert ScienceWhen silver chloride is exposed to light, its colour changes from white to grey. This is an example of which type of decomposition reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Expert ScienceWhich pair correctly identifies the brown gas and the colourless gas produced when lead nitrate is heated?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Expert ScienceWhen the gas evolved during thermal decomposition of calcium carbonate is passed through lime water, it turns milky. Which gas does this confirm?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Expert ScienceWhich product is formed when water is added to calcium oxide?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Expert ScienceIn which of the following reactions do oxidation and reduction occur simultaneously?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Expert ScienceA student calls the reaction \(2AgCl(s) \xrightarrow{\text{sunlight}} 2Ag(s)+Cl_2(g)\) a displacement reaction because chlorine is released. What is the best correction of the student's error?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Expert ScienceWhich of the following equations is a correct example of a precipitation reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Expert ScienceIf heat is shown on the reactant side of a chemical equation and one compound breaks down to form two or more products, what is the correct classification of the reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Expert ScienceWhich statement about oxidation and reduction is correct in the given equation? \(2\mathrm{FeCl_3} + \mathrm{SnCl_2} \rightarrow 2\mathrm{FeCl_2} + \mathrm{SnCl_4}\)Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Expert ScienceWhen an iron nail is placed in blue copper sulphate solution, the solution turns green and a reddish-brown coating forms on the nail. What type of reaction is this?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Expert ScienceWhich of the following equations represents a displacement reaction in which a more reactive metal displaces a less reactive metal from its aqueous salt solution?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Expert ScienceWhich of the following is a redox reaction in which the oxidation number of one element increases and that of another element decreases?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Expert ScienceWhen black copper(II) oxide, \(\mathrm{CuO}\), is heated with hydrogen gas, reddish-brown copper is formed. This change is an example of what?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Expert ScienceWhy does copper deposit on the surface of an iron nail placed in copper sulphate solution?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Expert ScienceWhat is the correct order of gases produced at the anode and cathode during the electrolysis of water?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Expert ScienceWhy are light-sensitive silver salts, such as silver chloride, stored in dark-coloured bottles?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Expert ScienceWhich substance is the yellow solid residue formed on thermal decomposition of lead nitrate?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Expert