Sample pre-lab quiz for Halogenation of Alkanes experiment.

1) The energy for the initiation step in the free radical halogenation of alkanes with bromine, the cleavage of Br₂ to form two bromine atoms, is provided by:

1. the solvent, methylene chloride
2. light
3. high pressure
4. none of the above

2) The initiation step in the bromination of methane (CH₄) is:

3) In the following structure, which is the most reactive hydrogen?

4) The hydrocarbons used in this experiment (cyclohexane, ethyl benzene, etc.) are in general:

1. carcinogenic
2. caustic and highly toxic
3. flammable
4. extremely corrosive

5) In the molecule below, the circled hydrogen is:

1. primary aliphatic
2. tertiary aliphatic
3. secondary benzylic
4. aromatic

6) Wastes in this experiment go:

1. in the aqueous waste carboy
2. in the organic waste carboy
3. in the recovery jar
4. down the drain

7) Methylene chloride is:

1. carcinogenic
2. flammable
3. a moderate health hazard
4. corrosive

Answers.