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Class 10 · Science · Medium
→What is the role of light energy in photosynthesis?
Class 10 · Science · Medium
→Why is respiration considered a chemical reaction?
Class 10 · Science · Medium
→When an iron nail is kept in a blue copper sulphate solution for some time, the solution turns light green and a reddish-brown coating forms on the nail. What type of reaction is this?
Class 10 · Science · Medium
→On what basis is conversion of milk into curd a chemical change?
Class 10 · Science · Medium
→What is the main difference between a chemical change and a physical change?
Class 10 · Science · Medium
→Under which condition is rancidity most likely to increase fastest in oily food?
Class 10 · Science · Medium
→An iron object is coated with zinc to prevent rusting. What is the main reason for this method?
Class 10 · Science · Medium
→What is the benefit of filling nitrogen to prevent rancidity?
Class 10 · Science · Medium
→What is the main chemical cause of the bad taste and smell in oils and fats?
Class 10 · Science · Medium
→Which metal is coated on iron during galvanisation to protect it from rusting?
Class 10 · Science · Medium
→Which method most directly prevents iron from coming into contact with air and moisture, thereby protecting it from rusting?
Class 10 · Science · Medium
→Why is rusting of iron called slow oxidation?
Class 10 · Science · Medium
→How is a redox reaction identified?
Class 10 · Science · Medium
→In which situation is a substance considered to be reduced?
Class 10 · Science · Medium
→In which situation is a substance considered to be oxidised?
Class 10 · Science · Medium
→When an aqueous solution of barium chloride is mixed with an aqueous solution of sodium sulphate, which white precipitate is formed?
Class 10 · Science · Medium
→In which reaction do both double displacement and precipitation occur?
Class 10 · Science · Medium
→In a double displacement reaction, between which substances does the exchange of ions occur?
Class 10 · Science · Medium
→A student said that electrolysis of water is a combination reaction. Why is this statement incorrect?
Class 10 · Science · Medium
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