Courses
Courses for Kids
Free study material
Offline Centres
More
Store

# Phosphorus forms two oxides ${{\text{P}}_2}{{\text{O}}_3}{\text{ and }}{{\text{P}}_2}{{\text{O}}_5}$ . Which law can be proved by the weights of P and O?A.Constant proportionB.Multiple proportionC.Reciprocal proportionD.Definite proportion

Last updated date: 12th Sep 2024
Total views: 411k
Views today: 6.11k
Verified
411k+ views
Hint: Various laws were given to describe chemical composition of a compound but there laws have certain limits and applications. Such chemical composition of a compound can be described by a particular law.

Law of constant proportion was given by Louis proust. This law states that chemical composition of a compound remains constant whether it is obtained by any method or taken from any source. This can simply be understand by taking example of carbon dioxide as it is observed that carbon and oxygen are always combined in the ratio of $\left( {12:32} \right){\text{or}}\left( {3:8} \right)$ . A pure chemical compound always contains a fixed ratio by weight or mass of its constituent element irrespective of the source from which it is obtained.
 Compound Parts of nitrogen Parts of oxygen ${{\text{N}}_2}{\text{O}}$ 28 16 ${{\text{N}}_2}{{\text{O}}_2}$ 28 32 ${{\text{N}}_2}{{\text{O}}_3}$ 28 48 ${{\text{N}}_2}{{\text{O}}_4}$ 28 64 ${{\text{N}}_2}{{\text{O}}_5}$ 28 80
The masses of oxygen which combine with the same mass of nitrogen in the five compounds bear a ratio $16:32:48:64:80$ or $1:2:3:4:5$ . Similarly, Phosphorus and Oxygen combines to form two oxides ${{\text{P}}_2}{{\text{O}}_3}{\text{ and }}{{\text{P}}_2}{{\text{O}}_5}$ and here masses of oxygen which combines with same mass of phosphorus bear a simple ratio of $3:5$ .