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Class 10 · Science · Medium
→Which of the following is a decomposition reaction but not a photolytic decomposition reaction?
Class 10 · Science · Medium
→When an iron nail is placed in a blue copper sulphate solution, the solution changes colour and copper gets deposited. What type of reaction is this?
Class 10 · Science · Medium
→When is the aqueous symbol used?
Class 10 · Science · Medium
→What is the correct meaning of a downward arrow in a chemical equation?
Class 10 · Science · Medium
→What is the correct meaning of an upward arrow in a chemical equation?
Class 10 · Science · Medium
→If bubbles form during an experiment, what is the most careful conclusion?
Class 10 · Science · Medium
→If the container becomes hot during a reaction, which conclusion is most suitable?
Class 10 · Science · Medium
→If a reaction container feels cold to the touch during a chemical reaction, what is the most appropriate conclusion?
Class 10 · Science · Medium
→What is done to balance a skeletal chemical equation?
Class 10 · Science · Medium
→How does a balanced equation show conservation of mass?
Class 10 · Science · Medium
→Why is it wrong to change subscripts while balancing an equation?
Class 10 · Science · Medium
→What is the correct reason for considering photosynthesis a chemical reaction?
Class 10 · Science · Medium
→Why is respiration called an exothermic reaction?
Class 10 · Science · Medium
→Why is the conversion of milk into curd considered a chemical change?
Class 10 · Science · Easy
→Why is melting of ice not a chemical change?
Class 10 · Science · Medium
→Why does keeping food in an airtight container reduce rancidity?
Class 10 · Science · Medium
→How do antioxidants help preserve food materials?
Class 10 · Science · Medium
→What is the main scientific reason for filling chips packets with nitrogen gas?
Class 10 · Science · Medium
→A student calls the reaction \(Fe + CuSO_4 \rightarrow FeSO_4 + Cu\) a double displacement reaction. What is the correct correction to the statement?
Class 10 · Science · Medium
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