Multiple choice

Petroleum is a dark coloured, thick crude oil found deep below the ground. It is a complex mixture of

  1. carbon and hydrogen

  2. carbon and nitrogen

  3. hydrogen and calcium

  4. calcium and nitrogen

  5. hydrogen and nitrogen

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is the correct option. Petroleum is a complex mixture of carbon and hydrogen. Carbon and hydrogen make up the compounds called hydrocarbons.