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Thermal Decomposition

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

ScienceWhy is it incorrect to identify the brown gas evolved on heating lead nitrate as oxygen?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1ExpertScienceWhat is the solid residue in the thermal decomposition of lead nitrate?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1MediumScienceThe appearance of brown gas on heating lead nitrate identifies which gas?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1MediumScienceThe gas produced on heating calcium carbonate turns lime water milky. Which gas is it?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1ExpertScienceWhich solid product is formed when calcium carbonate is strongly heated?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1ExpertScienceWhen calcium carbonate is heated in an intact closed container, it decomposes into calcium oxide and carbon dioxide. If the carbon dioxide does not escape, what can be concluded about the total mass of the container and its contents before and after the reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1ExpertScienceWhich of the following reactions is a decomposition reaction but not a thermal decomposition reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5HardScienceWhich of the following is a decomposition reaction but not an electrolytic decomposition reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5HardScienceA student heated 12.0 g of calcium carbonate in an open crucible and obtained 6.7 g of solid. Which evaluation is correct?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5HardScienceWhy is it incorrect to identify the brown fumes evolved on heating lead nitrate as oxygen?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5HardScienceWhen lead nitrate is heated, a solid residue and a brown gas are formed. Which pair is correct?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5HardScienceWhen a single compound breaks down into two or more simpler substances on heating, what type of reaction is it?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5EasyScienceLimestone, \(\mathrm{CaCO_3}\), is heated in a sealed container and decomposes into calcium oxide and carbon dioxide. If the carbon dioxide does not escape, what is the correct conclusion about the total mass of substances before and after the reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5HardScienceA student wrote the thermal decomposition of lead nitrate as Pb(NO₃)₂ → PbO + NO₂ + O₂ and claimed that it was balanced. Which change gives the correct balanced equation?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4HardScienceA student heated calcium carbonate in an open test tube. The mass of the solid decreased after heating, so the student concluded that the law of conservation of mass is incorrect. What is the correct correction to this conclusion?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4HardScienceWhich is the correct pair of solid residue and brown gas formed on heating lead nitrate?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4HardScienceThe brown gas on heating lead nitrate indicates the presence of which substance?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4MediumScienceWhich solid product is formed on thermal decomposition of calcium carbonate?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4HardScienceThe gas evolved on heating calcium carbonate turns lime water milky. Which gaseous product does this confirm?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4HardScienceWhen a single compound breaks down into two or more simpler products on heating, what type of reaction is it?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Medium