Which of the following pairs of compounds strictly illustrates the Law of Multiple Proportions? — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question

💡 Solution & Explanation

The law of multiple proportions requires exactly two elements to combine to form two or more different compounds. $SnCl_2$ and $SnCl_4$ are formed by the exact same two elements (Tin and Chlorine) combining in different mass ratios. $H_2O$ and $D_2O$ involve different isotopes of hydrogen, which violates the strict classical definition of the law. $NaCl$/$NaBr$ and $MgO$/$Na_2O$ involve three different elements.