If two elements can combine to form more than one compound, the masses of one element that combine with a fixed mass of the other element, are in whole number ratio.
(a) Is this statement true?
(b) It yes, according to which law?
(c) Give one example related to this law.

Explanation

(a) Yes, the given statement is true.
(b) This is true according to Low of Multiple Proportions.
(c) Carbon and oxygen combine to form CO and `CO_(2)`
`{:(" "2C" ",+," "O_(2)" ",rarr," "2CO),(""2xx12g,," 32 g",,"Carbon monoxide"),(" "C" ",+," "O_(2)" ",rarr," "CO_(2)),(" 12 g",," 32 g",,"Carbon dioxide"):}`
Masses of `O_(2)` which combine with fixed mass of C in the two cases are 16 g and 32 g which are in the ratio `1:2` which is a simple whole number ratio.