Question

Carbon and oxygen form two compounds. Carbon content in one of them is $42.9$% and in the other is $27.3$%. The given data is in agreement with:

• A. law of conservation of mass
• B. law of multiple proportions
• C. law of reciprocal proportions
• D. law of definite proportions

Answer 1

Answer: (B)

law of multiple proportions

The given data is in agreement with Law of multiple proportions.

The Law of multiple proportions states that the masses of one element combine with a fixed mass of the second element are in a ratio of whole numbers.

In $100$ $g$ of the first compound $O:C=$$57$ $/42.9$ $=1.33$

In $100$ $g$ of the second compound $O:C=$$72.7$ $/27.3$ $=2.66$

Ratio $=2.66:1.33=2:1$

This whole number ratio is consistent with Law of multiple proportions.