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Q.

Law of multiple proportions states that:

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a

The elements are always present in definite proportions by mass in a chemical substance.

b

If two elements combine to form more than one compound, their masses in the reaction are in the ratio of small whole numbers.

c

Mass cannot be created or destroyed in a chemical reaction.

d

At a given constant temperature and pressure, the volume of gaseous molecules is directly proportional to the total number of moles. 

answer is B.

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Detailed Solution

Dalton issued this law in the year 1803. This law states that ‘if two elements combine to form more than one compound, their masses in the reaction are in the ratio of small whole numbers.’

 
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