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Class 10 · Science · Medium
→Which method most effectively reduces rancidity in foods containing oils and fats?
Class 10 · Science · Medium
→In which condition is an iron object most likely to rust?
Class 10 · Science · Medium
→What is the main difference between displacement and double displacement reactions?
Class 10 · Science · Medium
→What is the correct reason for rubbing and cleaning a magnesium ribbon before burning it?
Class 10 · Science · Medium
→Which of the following statements about a balanced chemical equation is incorrect?
Class 10 · Science · Medium
→If gas evolves in a reaction but the colour does not change, what is the correct conclusion?
Class 10 · Science · Medium
→A student says that every colour change is a chemical reaction. What is the correct conclusion?
Class 10 · Science · Medium
→Which of the following reactions is an example of thermal decomposition?
Class 10 · Science · Medium
→Which of the following reactions is an example of electrolytic decomposition?
Class 10 · Science · Medium
→Which of the following reactions is an example of photolytic decomposition?
Class 10 · Science · Medium
→Which of the following reactions is an example of a double displacement reaction?
Class 10 · Science · Medium
→Why is photosynthesis considered a chemical reaction?
Class 10 · Science · Medium
→If the reaction vessel becomes hot during a chemical reaction, which type of reaction does this indicate?
Class 10 · Science · Medium
→If the temperature of a reaction mixture decreases during a reaction, it generally indicates which type of reaction?
Class 10 · Science · Easy
→Which of the following observations is not evidence that a chemical reaction has occurred?
Class 10 · Science · Easy
→When is the aqueous state symbol (aq) used in a chemical equation?
Class 10 · Science · Medium
→What is the correct meaning of upward and downward arrows in a chemical equation?
Class 10 · Science · Medium
→According to the law of conservation of mass, how should the number of atoms of each element compare on the reactant and product sides of a balanced chemical equation?
Class 10 · Science · Medium
→Why are coefficients changed instead of chemical formulae while balancing equations?
Class 10 · Science · Medium
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