Explicit CHEMISTRY

O.J. OLAOYE

260 pages

Chemistry is more than a collection of symbols, equations and facts to be memorised. It is the study of matter, its composition, properties and transformations, and it provides a logical framework for understanding many of the processes that occur in everyday life. A sound knowledge of Chemistry is therefore essential not only for success in examinations but also for further study in medicine, pharmacy, engineering, agriculture, environmental science and other science-related disciplines. Explicit Chemistry: A Revision Course for JAMB/UTME Third Edition has been carefully prepared to help candidates develop the knowledge, confidence and examination skills required to excel in the Unified Tertiary Matriculation Examination. The content follows the current JAMB Chemistry syllabus and presents the required topics in a clear, systematic and student-friendly manner. Each chapter begins with the relevant syllabus focus and provides concise but sufficiently detailed revision notes, important definitions, chemical equations, tables, illustrations, memory aids, examination tips and warnings about common errors. Particular attention has been given to areas that students often find difficult, especially mole calculations, stoichiometry, gas laws, volumetric analysis, energetics, electrolysis, equilibrium and organic chemistry. Worked examples are presented step by step so that students can understand not only the final answer but also the reasoning, formulae, units and chemical principles involved. Structural formulae, reaction pathways and labelled diagrams have also been included wherever they make a concept easier to understand and remember. The revision questions comprise a broad selection of past JAMB/UTME questions together with additional syllabus-focused questions designed to strengthen topics that are less frequently represented in the historical question bank. The questions expose students to the wording, patterns, calculations, diagrams and reasoning commonly encountered in the examination. Where an older question contains an ambiguity, outdated scientific expression or defective option, an explanatory note has been provided rather than allowing the learner to memorise an incorrect idea. A comprehensive answer section is included at the back of the book. It provides verified answer keys, explanations of important concepts and fully worked solutions to calculation-based questions. Students are strongly encouraged to attempt each set of questions before consulting the answers. Errors should be reviewed carefully, and difficult questions should be attempted again until the underlying concept is understood. Used in this way, the book becomes not merely a collection of questions but a structured programme of study, practice and self-assessment. Teachers and tutors may also use the book as a teaching guide, a source of class exercises, a revision manual and a bank of examination-standard questions. However, the greatest benefit will come from combining the book with attentive classroom learning, regular practice, careful observation during practical work and consistent reference to the JAMB syllabus. We acknowledge the contributions of teachers, examination bodies, scientists and educational writers whose work has supported the teaching and learning of Chemistry over the years. We also appreciate the students whose questions and difficulties have helped to shape the explanations and worked examples presented in this edition. It is our hope that Explicit Chemistry will simplify difficult concepts, correct common misconceptions and help every diligent student approach the JAMB/UTME Chemistry examination with confidence.