Two samples of lead oxide were separately reduced to metallic lead by heating in a current of hydrogen. The weight of lead from one oxide was half the weight of lead obtained from the other oxide. The data illustrates [AMU 1983] (a) Law of reciprocal proportions (b) Law of constant proportions (c) Law of multiple proportions (d) Law of equivalent proportions
For one of the samples if we consider the weight of lead as 1 then the other will be 2 as one is half of the other and hence the ratio of metallic lead for the two compounds will be: 1:2.