Practice tests
http://www.dorjegurung.com/chemistry/IB1_practice_tests/index.htm
Organic Chemistry
Drugs and Medicine
Environmental Chemistry
Option D - Environmental Chemistry Quick summary
Environmental Chemistry-self contained lessons
Environmental Chemistry practice Quiz
Environmental Chemistry
Primary air pollutants
Effect of primary
pollutants
Reduction of primary
pollutants
Acid rain
Environmental Chemistry set I
Environmental Chemistry set II