NECTA Form 1–4 (CSEE) · Form 1 · Chemistry (Form 1) · Notes · Unit 4: Air, Composition, Combustion, Fire Fighting & Rusting of Iron

Unit 4: Air, Composition, Combustion, Fire Fighting & Rusting of Iron

Official NECTA CSEE Form 1 Chemistry Topic 1.3: Percentage composition of air, experimental determination of oxygen using copper and iron, evidence air is a mixture, combustion, Fire Triangle (fuel, oxygen, heat), complete vs incomplete combustion and toxic carbon monoxide mechanism, fire classifications (A, B, C, D, electrical), fire extinguishers (water, foam, CO2, DCP), conditions for rusting (4-test-tube experiment), electrochemical mechanism of corrosion, and rust prevention methods (galvanizing, tinning, sacrificial cathodic protection, alloying).