Question

Sodium combines with ${}_{17}^{35}\text{Cl}$ and ${}_{17}^{37}\text{Cl}$ to give two types of sodium chloride. There formation follows the law of :

• A. gaseous diffusion
• B. conservation of mass
• C. reciprocal proportion
• D. none of these

Answer 1

Answer: (B)

conservation of mass

The Law of Conservation of mass : In a chemical change total mass remains conserved. i.e. mass before reaction is always equal to mass after reaction. But here, two product forms due to different isotopes.