Hydrocarbons Test 1. Name:......................................................................................................... What is an alkane? ...................................................................................................................................................................................... ..................................................................................................................................................................................(2) 2. Name 3 alkanes and draw their molecular structure Name Structure (6) 3. Why are alkenes called unsaturated hydrocarbons? ...................................................................................................................................................................................... ...................................................................................................................................................................................... ..................................................................................................................................................................................(1) 4. a. What is the chemical test for an alkene? ..................................................................................................................................................................(2) b. Write the equation of this reaction, using propene as the alkene used ..................................................................................................................................................................(1) 5. What is cracking? ...................................................................................................................................................................................... ..................................................................................................................................................................................(1) 6. Why is cracking needed? ..................................................................................................................................................................................(1) 7. What homologous series are produced when a sample undergoes the cracking process? ..................................................................................................................................................................................(1) 8. You have 2 liquids, one is crude oil and one is a fraction that has been cracked. Explain how you could find out which one is which? ...................................................................................................................................................................................... ...................................................................................................................................................................................... ..................................................................................................................................................................................(3)