Chemistry 5070 · O Level · Elements, compounds and mixtures

Elements, compounds and mixtures — practice question

Dry air consists of a mixture of gases, and $99\%$ of it is nitrogen and oxygen. What is the principal component of the remaining $1\%$?

  • Aargon
  • Bhelium
  • Chydrogen
  • Dwater vapour

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI