Hi

I ll take the GRE soon , so I ve done some searches for good sources to this exam, there are some books which are comperehensive for 4 branches of chemistry, they cover any part of chemistry but they are not so detailed , and good for preparing for this important exam.

  and I found 3 different test taken before,

I hope they ll be useful

Instant Notes in Analytical Chemistry

instant notes in physical chemistry

instant notes in organic chemistry

instant notes in inorganic chemistry

GRE subject test for chemistry 

test 1 - test 2 - test 3