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Q.

According to the Law of Constant Proportions, which of the following statements is true?

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a

The total mass of reactants equals the total mass of products in a chemical reaction.

b

The volume of a gas is directly proportional to its temperature.

c

In a compound, the elements are always combined in fixed proportions by mass.

d

The density of a substance remains constant regardless of its quantity.

answer is B.

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Detailed Solution

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The Law of Constant Proportions states that a chemical compound always contains the same elements combined in the same proportion by mass, regardless of the source (or) method of preparation of the compound. This means that the ratio of the masses of the elements in a compound is always the same.

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