Question

a. What are Isotopes?
b. Write any three applications of Avogadros law?

Answer 1

a) Isotopes are the atoms of the same element having same atomic number but different atomic masses. For example: ${}_{17}C{l}^{35}$ and ${}_{17}C{l}^{37}$ is a pair of isotopes.

b) Applications are:

• It determines the atomicity of the gas.
  
• It determines the molecular formula of a gas.
  
• Explains Gay Lussac's Law.
  
• It determines the relation between molecular weight and vapour density.