Q. 5. Which of the following conditions is necessary for a chemical reaction? (A) It must be accompanied with change in temperature and pressure. (B) At least one of the reactants must be in a fixed quantity. (C) It must follow the law of conservation of mass. (D) All of the above.
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Among the following, the conditions necessary for a chemical reaction are: It must be accompanied by a change in temperature and pressure, at least one reactant must be present in fixed quantity, it must follow the law of conservation of mass. Thus, the correct option is D) All of the above.
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