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Q.

In a chemical reaction, if the total mass of the products is 25g and the total mass of the reactants is 30g, which of the following statements is true?

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a

The Law of Conservation of Mass has been violated

b

The reaction must be exothermic

c

The reaction must be endothermic

d

The mass difference is accounted for by the release of energy.

answer is A.

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Detailed Solution

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The given statement violates the law of conservation of mass. As per the Law of Conservation of Mass; In a chemical reaction, the mass of the product will always be equal to the mass of reactants but, here we are given that the mass of product is 25g and mass of reactant is 30g. Which can not be true as per the law.

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