How do I find harder questions?
Every Subject in Chem101 has a subsection of questions that are called "Challenge Questions" and are harder than the standard questions in the category.
To find them, simply navigate to any subject and click on the subject name. Scroll down to the bottom of the subject and click on "Challenge Questions."
Don't see a challenge question type that you were looking for? You can author your own using this guide, or email us here with feedback.