What type of chemical reaction is used to extract metals from their naturally occurring compounds like oxides or chlorides?

9 Explain why, food products containing fats and oils (like potato chips) are packaged in nitrogen. 10 Give one example of a decomposition reaction which is carried out:

(a) with electricity

(b) by applying heat

12 Name two anti-oxidants which are usually added to fat and oil containing foods to prevent rancidity. 13 Write one equation each for the decomposition reactions where energy is supplied in the form of (a) heat, (b) light, and(c) electricity.