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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।

ScienceWhy does copper deposit when an iron nail is placed in copper sulphate solution?Class 10Metals and Non-metalsReactivity seriesLevel 5MediumScienceWhat causes the green solution when an iron nail is placed in copper sulphate solution?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5MediumScienceOn what basis is the difference between thermal decomposition and electrolytic decomposition most clearly identified?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5MediumScienceWhat is the main purpose of adding a little acid during electrolysis of water?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5MediumScienceWhat is the identity of the gas formed at the anode during electrolysis of water?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5MediumScienceIn electrolysis of water, if hydrogen is thirty-six millilitres, what will be the expected volume of oxygen?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5MediumScienceWhat is the most suitable reason for storing silver salts in dark coloured bottles?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5MediumScienceSensitivity of silver bromide to light is related to which use?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5MediumScienceWhy does grey colour appear when silver chloride is kept in light?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5MediumScienceWhy is it wrong to consider the brown gas in lead nitrate experiment as oxygen?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5MediumScienceIn thermal decomposition of lead nitrate the yellow solid residue is of which substance?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5MediumScienceWhat is the correct set of brown gas and colourless gas formed on heating lead nitrate?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5MediumScienceTurning lime water milky is a strong experimental indication for which gas?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5MediumScienceWhich is the correct pair of solid residue and gas in decomposition of calcium carbonate?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5MediumScienceWhen calcium carbonate is heated a solid and a gas are formed. What type of reaction is this?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5MediumScienceWhat are the product and energy change when water is added to calcium oxide?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5MediumScienceHow is burning of magnesium both combination and oxidation at the same time?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5MediumScienceCleaning magnesium ribbon before burning removes which obstacle?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5MediumScienceWhen copper oxide is heated with hydrogen, the black substance becomes reddish brown. What does this prove?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4MediumScienceWhy is a precipitate shown by a downward arrow in a chemical equation?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Medium