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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

$(a)\;\text { Law of reciprocal proportions } \\ (b)\;\text{Law of constant proportions} \\(c)\;\text{Law of multiple proportions} \\(d)\;\text{Law of conservation of mass} $

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A)
This shows that the weights of lead combing with field weight of oxygen are in the ratio $1/2 \; : \; 1$ or $1:2$ which is in accordance with law of multiple proportions.
Hence c is the correct answer.
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