SS1 Computer – History of Computers 3 – Generations of Computers

SS2 Chemistry – Water

CONTENT Sources, Types, Uses, and Structure of Water. Laboratory Preparation of Water. Test for Water Causes/ Removal of Hardness of Water. Purification of Water for Municipal Supply.   WATER Water

SS1 Chemistry – Introduction to Hydrocarbons

CONTENTS   Sources of hydrocarbon Classification (of aliphatic hydrocarbon) Petroleum and natural gas (i) Refining of Petroleum by fractional distillation (ii) Uses of different fractions   PETROLEUM CHEMISTRY HYDROCARBON AND