(7) FALSE
Absolute Electric Potential refers to the voltage difference between the point in question and a standard position, normally taken to be infinitely far away.

(8) TRUE
A positive test charge placed near a negative charge requires work to be done against the unlike-sign attraction to pull it away to infinity. Thus, we would expect the absolute electric potential to be negative.

(9) & (10): Both TRUE
Equipotentials cannot intersect for the same reason that electric field lines cannot cross over each other (see Quiz on Electric Fields).