I need help with these pre-lab questions.

CHEM 131 Pre-Lab: Purpose: Name: Prelab Questions: 1. For each class of compounds, draw the chemical structure of one representative compound: Alkane Alkene Alkyne Aromatic 2. Circle the indicated feature of each example you drew in question 1. 3. When an oil spill occurs in the ocean an oil-slick develops on the surface of the water. Based on this information, what conclusion can you draw about the make-up of oil (ie, what types of atoms and bonds is oil composed of, and which of the four classes of compounds in question 1 does this correspond to)? 4. For each chemical test you will be performing, describe what observation you should make for a positive test Bromine test Potassium permanganate test: Sulfuric acid test: 5. For each test predict which of your test compound(s) should give a positive result. The test compounds are hexane, cyclohexene, and toluene. At least one of them should give you a positive result for each test. Bromine test: Potassium permangan ate test! Sulfuric acid test