S C Kheterpal, S N Dhawan and, P N Kapil Solutions for Chapter: Some Basic Concepts of Chemistry, Exercise 7: PROBLEMS FOR PRACTICE

Carbon dioxide contains $27.27$ % of carbon, carbon disulphide contains $15.79$ % of carbon and sulphur dioxide contains $50$ % of sulphur. Are these figures in agreement with the law of reciprocal proportions?

Phosphorus trichloride contains $22.57$% of phosphorus, phosphine (${\mathrm{PH}}_3$ ) contains $91.18$ % of phosphorus while hydrogen chloride gas contains $97.23$% of chlorine. Prove by calculations, which law is illustrated by these data.

$61.8 \mathrm{g}$ of $\mathrm{A}$ combine with $80 \mathrm{g}$ of $\mathrm{B}$ $30.9 \mathrm{g}$ of A combine with $106.5 \mathrm{g}$ of $\mathrm{C}$. $\mathrm{B}$ and $\mathrm{C}$ combine to form compound ${\mathrm{CB}}_2$. Atomic weights of $\mathrm{C}$ and $\mathrm{B}$ are respectively $35.5$ and $6.6$. Show that the law reciprocal proportions is obeyed.