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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 chemical equations represents a combination reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3MediumScienceWhen lead nitrate is heated, a brown gas is evolved. Which equation correctly represents this thermal decomposition?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3MediumScienceWhen is using a downward arrow appropriate in a precipitation reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3MediumScienceHow are the products identified in a double displacement reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3MediumScienceOn thermal decomposition of lead nitrate, which solid product is formed besides gases?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3MediumScienceWhy must subscripts in chemical formulae not be changed while balancing a chemical equation?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3MediumScienceBefore balancing a chemical equation, what should be checked first?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3MediumScienceIn which reaction is heat energy supplied as a necessary condition for the reaction rather than released as a product?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2MediumScienceWhile balancing a chemical equation, what must not be changed?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2MediumScienceIf the number of atoms of an element is not the same on the reactant and product sides of a chemical equation, what is the equation called?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2MediumScienceWhich statement correctly explains the law of conservation of mass?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2MediumScienceIf a downward arrow (↓) is shown next to a product in a chemical equation, what does it indicate?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2EasyScienceIf an upward arrow (↑) is written next to a product in a chemical equation, what does it indicate?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2EasyScienceWhat do state symbols such as \((s)\), \((l)\), \((g)\), and \((aq)\) indicate in a chemical equation?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2MediumScienceWhen a single compound breaks down into two or more simpler substances on heating, what is the reaction called?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2MediumScienceWhich pair of products is formed when calcium carbonate is heated?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2MediumScienceWhen the reaction of magnesium burning in oxygen is balanced, what coefficient is placed before magnesium oxide?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2MediumScienceIf a chemical equation has 2 oxygen atoms on the reactant side and 1 oxygen atom on the product side, what is the equation?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1MediumScienceIn which type of reaction do the ions of two compounds exchange with each other?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1MediumScienceA student says that every colour change is a chemical reaction. What is the correct conclusion?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1Medium