Chemistry Paper 1 – Foundation Chemistry Revision Questions with Answer

What are the 3 states of matter? - Ans .Solid, liquid and gas What is the process for extracting iron form its ore? - Ans .Heat it with carbon (coke) in a blast furnace Why is carbon used for extracting iron from ore? - Ans .It is more reactive What is chromatography used to separate? - Ans .A mixture of pigments How do you calculate Rf values? - Ans .Distance pigment moved/Distance solvent moved What force holds oppositely charged ions together? - Ans .Electrostatic Which state of matter has the most energy? - Ans .Gas What is produced when an acid and metal hydroxide react? - Ans .Salt and Water Why do ionic compounds have high melting points? - Ans .Strong electrostatic force take lots of heat to overcome Why can ionic compounds not conduct when solid? - Ans .The ions are in a fixed position Why can ionic compounds conduct when molten or dissolved? - Ans .The ions are free to move What is the positive electrode called? - Ans .Ano