What are the answers to these organic chemistry questions; they were on a test and i got them wrong?

Our teachers hasn't given us the correct answers, if you know these it would help A LOT.

1. Most common type of chemical reaction with a double bond: ____
2. any carbon atom with a charge:_____
3. State the general chemical formula for a cyclic alkyne: ____
4. Give the common name for....
     a. CH[sub 2]=CH
     b. CH[sub 2]=CH-CH[sub 2]
     c. HC=C-CH[sub 2]
5. Describe why this name is incorrect: 2-methyl -1-propene
6. Most common reaction involving an aromatic compound: ___
7. ______ involves placing an "R" group on benzene with aluminum chloride
8. Term used to describe electrons in benzene: ______
9. What do ring activators add to an aromatic compound to increase reaction speed?


Any help is greatly appreciated :]