Multiple choice general knowledge science & technology A compound which contains only hydrogen and Carbon is called a Alloy Hydrocarbon Carbohydrate Mixture Reveal answer Fill a bubble to check yourself B Correct answer Explanation A hydrocarbon is defined as a compound containing only hydrogen and carbon atoms. 'Hydro' refers to hydrogen and 'carbon' to carbon. Alloys are metal mixtures, carbohydrates contain oxygen, and mixtures are not pure compounds.