Are My Multiple Choice Answers Correct?

[Paymemoney]

Hi
The answers i picked are:
1)B
2)C
3)B
4)A
5)C
6)A

Can someone tell me if my solutions from the attachment are correct.

P.S

 

[Lok]

1)A
2)C
3)B
4)A
5)D
6)B
7)A

I've got no ideea why :P

 

[Paymemoney]

So does anybody else have any suggestions about the questions?

 

[Lok]

So does anybody else have any suggestions about the questions?

This being homework, I'm not inclined on helping you without any work from your part so if you would kindly show me your way of thought in the 3 cases where I gave a different result that would be great. Equations do best, if possible.