This guide covers the entire O-Level Science Chemistry syllabus Each unit in this book consists of concise notes followed by critical questions. Clear examples are provided to illustrate the application of concepts and detailed diagrams are also provided where necessary to facilitate effective learning and knowledge building. The critical questions found at the end of each chapter consist of a range of essential questions modelled after O-Level questions. Fully worked solutions are also provided. Features: * Ideal study guide for the preparation of assessments and examinations, with units arranged in chronological order under sub-topics. * Concise notes together with clear examples and detailed diagrams. * Critical questions to assess different aspects of the learning outcomes.* Full worked solutions with explanation