1. Explain the difference between saturated and unsaturated hydrocarbons. 2. Draw the distinguishing structural feature for the following: alkanes alkenes alkynes aromatics 3. Toluene is the common name of methylbenzene. Draw the structure of toluene (C7H8). 4. Toluene is classified as an aromatic compound. It has the potential to react with bromine, Br2. Will this be an addition or substitution reaction? Which Two reaction conditions are required? 5. Draw a condensed structure to replace the italicized reactant and complete the chemical equation for each of the following reactions: a) othene +Br2(i) b) propane +Br2(0)darkcooland c) propane +Br2(1)sulight 6. A student has two test tubes labeled A and B, each containing a colorless liquid. The student adds several drops of a potassium permanganate solution to each one. The solution in test tube A turned purple, while the solution in test tube B turned brown. Which test tube, A or B, contains an alkane? Justify your answer. 7. Why must all open flames be extinguished before performing the bromine and potassium permanganate tests