1. Choose the best set of reaction conditions

2. Hoffmann elimination: bulky strong base

3. Choose the best set of reaction conditions

4. SN2 displacement: low temperature, good nucleophile.

5. Choose the best set of reaction conditions

6. E1 elimination: polar solvent, high temperature, weak base

7. Choose the best set of reaction conditions

8. Acetylide (alkyne) anions are good SN2 nucleophiles but require non-aqueous conditions.

9. Choose the best set of reaction conditions

10. Chromium (VI) is used to oxidize alcohols to carbonyls.