summary for chemistry unit 1a 4.0 / 5 based on 1 rating ? Chemistrysummary of chemistry unit 1aGCSEAQA Created by: Bushes1309Created on: 30-08-15 13:30 what is the symbol equation showing the thermal decomposition of limestone CaCO ---> CaO + CO2 1 of 13 what is calcium hydroxide used for to neutralise acidic soil and can be used in a test for carbon dioxide 2 of 13 what is the name of the method where plants are used to extract metals from soil phytomining 3 of 13 what is the definition of an ore a rock which contains enough metal to make it worthwhile extracting metal from it 4 of 13 what are the symbols for a) calcium b) carbon c)sodium a) Ca b) C c) Na 5 of 13 name three building materials made from limestone cement, mortar and concrete 6 of 13 give a reason why aluminium is an expensive metal a high temperature is needed to melt aluminium oxide so more energy is needed which is expenisve 7 of 13 what is the problem with using very pure iron it becomes too soft and bendy 8 of 13 what does crude oil consist of a mixture of hydrocarbons 9 of 13 is a short chain hydrocarbon more viscous (thick and gloopy) than a long chain hydrocarbon no it is more runny 10 of 13 name three pollutants released into the atmosphere when fuels are burned methane, sulphur dioxide, carbon dioxide 11 of 13 what products are produced when limestone reacts with sulphuric acid calcium sulphate + carbon dioxide+water 12 of 13 name three properties of metals any three of: strong, bendy, good conductorsof heat, good conductors of electricity 13 of 13
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