Chemistry Topical Revision Questions Introduction to Chemistry Simple classification of substances Acids bases and indicators Air and combustion Water and hydrogen Atoms and Periodic table Chemical families Structure and bonding Salts Effects of electric current on substances Carbon and its compounds Gas Laws Mole formulae and chemical equations Organic Chemistry I Nitrogen and its compounds Sulphur and its compounds Chlorine and its compounds Acids bases and Salts Energy changes in chemical and physical processes Electrochemistry Metals Organic chemistry II Radioactivity Marking Schemes Introduction to Chemistry Simple classification of substances Acids bases and indicators Air and combustion Water and hydrogen Atoms and Periodic table Chemical families Structure and bonding Salts Effects of electric current on substances Carbon and its compounds Gas Laws Mole formulae and chemical equations Organic Chemistry I Nitrogen and its compounds Sulphur and its compounds Chlorine and its compounds Acids bases and Salts Energy changes in chemical and physical processes Electrochemistry Metals Organic chemistry II Radioactivity