This practice exam has 5 questions, 3 conceptual, and 2 where you'll probably need to use a calculator. I take it repeatedly and get new questions every time, which is great for practice. It has a 10 minute time limit, leaving 2 minutes per question. I use the same pacing in my exams.
Question 1
1 pts
When a current flows through an ionic liquid such as salty water, the moving charges are
only electrons.
only protons.
only negative ions.
both positive and negative ions.
only positive ions.
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