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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।

ScienceWhat is the reaction called when a more reactive metal displaces a less reactive metal from its compound?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Easy ScienceWhat colour does silver chloride become when kept in sunlight?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Easy ScienceWhy does silver chloride change colour in the presence of light?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Easy ScienceThe decomposition of water into hydrogen and oxygen when electric current is passed through it is which type of reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Easy ScienceWhat is a decomposition reaction caused by heating called?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Easy ScienceWhen calcium carbonate is heated, it forms calcium oxide and carbon dioxide. What type of reaction is this?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Easy ScienceWhen a compound breaks down into two or more simpler substances, what type of reaction is it?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Easy ScienceWhat must be the same on the reactant and product sides of a balanced chemical equation?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Easy ScienceWhich of the following observations can be a common sign that a chemical reaction has occurred?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Easy ScienceWhy are most carbon compounds poor conductors of electricity?Class 10Chemical Substances – Nature and BehaviourCarbon and its CompoundsLevel 2Easy ScienceWhy do carbon compounds generally have low melting and boiling points?Class 10Chemical Substances – Nature and BehaviourCarbon and its CompoundsLevel 2Easy ScienceWhy does carbon generally form covalent compounds rather than ionic compounds?Class 10Chemical Substances – Nature and BehaviourCarbon and its CompoundsLevel 2Easy ScienceWhat is the phenomenon in which organic compounds have the same molecular formula but different structures called?Class 10Chemical Substances – Nature and BehaviourCarbon and its CompoundsLevel 2Easy ScienceSoaps are sodium or potassium salts of which type of acids?Class 10Chemical Substances – Nature and BehaviourCarbon and its CompoundsLevel 2Easy ScienceWhich structure do soap molecules form around oily dirt in water?Class 10Chemical Substances – Nature and BehaviourCarbon and its CompoundsLevel 2Easy ScienceWhich part of a soap molecule attracts oil and dirt?Class 10Chemical Substances – Nature and BehaviourCarbon and its CompoundsLevel 2Easy ScienceWhich part of a soap molecule attracts water molecules?Class 10Chemical Substances – Nature and BehaviourCarbon and its CompoundsLevel 2Easy ScienceWhat is the process of alkaline hydrolysis of an ester to produce soap called?Class 10Chemical Substances – Nature and BehaviourCarbon and its CompoundsLevel 2Easy ScienceA pleasant-smelling compound is formed when ethanol reacts with ethanoic acid. What is this reaction called?Class 10Chemical Substances – Nature and BehaviourCarbon and its CompoundsLevel 2Easy ScienceWhich carboxylic acid is obtained when ethanol is oxidised with alkaline potassium permanganate?Class 10Chemical Substances – Nature and BehaviourCarbon and its CompoundsLevel 2Easy