This practice exam is designed for the full-year ACS Analytical Chemistry Exam.
The idea is to take this as an exam, a timer is
part of the exam, so that the practice exam simulates the timed-test
environment. Students should avoid using notes while taking the practice
test so that the experience is as close to taking an exam as possible.

In addition to answering the questions, the person taking the practice exam
is asked to estimate the amount of mental effort they used to answer that question.
The practice exam system will then provide information about both how accurate
questions were answered, but also how the various topics rate in terms of
challenge the student encounters (as measured by the mental effort estimation).
This combination can help students set priorities for continued study prior to
taking the actual ACS exam.

Remember, this is a practice exam - it is not a tutorial that walks through analytical chemistry questions. It is a one-time use tool (retaking the practice exam will
not provide a good measure of preparedness because some of the items will
be remembered from the first time it was taken.)