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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।

ScienceWhen an iron nail is placed in copper sulphate solution, which salt is mainly present in the green solution formed?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2Medium ScienceIn the balanced chemical equation for the formation of water, \(2\mathrm{H_2} + \mathrm{O_2} \rightarrow 2\mathrm{H_2O}\), what is the ratio of hydrogen molecules to oxygen molecules?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2Medium ScienceWhen water is added to a coloured solution, its colour becomes lighter, but no new substance is formed. What does this change represent?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1Medium ScienceWhich of the following reactions is an example of a double displacement reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1Medium ScienceA white sample of silver chloride turns grey when kept in sunlight. Which equation correctly represents this change?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1Medium ScienceA student wrote \(Mg + O_2 \rightarrow MgO\) for the burning of magnesium in oxygen and claimed that it is balanced. Which is the correct balanced equation?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 7Easy ScienceWhich symbol shows the gaseous state in a chemical equation?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 7Easy ScienceA clean iron nail is immersed in a blue copper sulphate solution for some time. Which observation is correct?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 7Easy ScienceWhat is a reaction called in which a single compound breaks down into two or more simpler substances?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 7Easy ScienceWhat is the simplest way to identify a double displacement reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 7Easy ScienceWhen a magnesium ribbon burns, the reaction is \(2Mg + O_2 \rightarrow 2MgO\). Which statement about this reaction is correct?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 7Easy ScienceWhich of the following changes is an indication of a chemical reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 6Easy ScienceWhich of the following reactions is an example of a combination reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 6Easy ScienceWhich two gases are produced during the electrolysis of water?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 6Easy ScienceWhich of the following reactions is an example of a displacement reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 6Easy ScienceWhat is the best way to identify that a chemical reaction has occurred?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Easy ScienceWhat type of change occurs when milk is converted into curd?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Easy ScienceWhy is digestion of food a chemical change?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Easy ScienceA student writes \(H_2O_2\) instead of \(H_2O\) while balancing the equation \(H_2 + O_2 \rightarrow H_2O\). What is the correct way to correct this error?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Easy ScienceWhich state symbol is used to represent an aqueous solution in a chemical equation?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Easy