S2 Chemistry Holiday Work: Hydrogen, Oxygen, Air and Oxides

This Senior 2 Chemistry holiday assignment has structured questions on gases and the composition of air. Learners describe how dry hydrogen and dry oxygen are prepared in the laboratory, identify the gases and write equations for their reactions with copper(II) oxide, chlorine, magnesium, charcoal and iron. Other questions compare mixtures with compounds, ask for the percentage of oxygen in air and cover fractional distillation of liquid air. Learners also complete a table describing what happens when elements burn in oxygen, separate mixtures and explain how metals react with metal oxides. Mark allocations appear beside many questions. Some parts of the scanned text are hard to read.