OCR 21st century C1,2,3 4.0 / 5 based on 1 rating ? ChemistryCrude oil, cracking and hydrocarbonsGCSEOCR Created by: MrsParfittCreated on: 08-03-16 13:04 What 6 things make up the atmosphere? Nitrogen, Oxygen, Argon, Water vapour, Carbon dioxide and other gases 1 of 25 What is the arrangement of particles in a gas? They have large spaces between them. 2 of 25 What % of the atmosphere is Nitrogen? 78% 3 of 25 What % of the atmosphere is Oxygen? 21% 4 of 25 What % of the atmosphere is Argon? 1% 5 of 25 What element makes coal? Carbon 6 of 25 Petrol, diesel fuel and fuel oil are made from 2 elements, what are they? Carbon and Hydrogen (Hydrocarbons) 7 of 25 When oxygen combines with another element, what is it known as? Oxidation 8 of 25 When oxygen is removed from a compound, what is this known as? Reduction 9 of 25 In which gas would fuel burn better - pure oxygen or air? Pure oxygen 10 of 25 Name 4 pollutant gases released when power stations burn fossil fuels. Carbon dioxide, Sulfur dioxide, Carbon monoxide and Nitrogen oxides. 11 of 25 The materials we use are chemicals or mixtures of chemicals name 3 examples metals, ceramics and polymers 12 of 25 What materials can be obtained or made from living things, name 4? cotton, paper, silk and wool 13 of 25 Where do we get the materials to make synthetic materials? From the Earth's crust, they are raw materials 14 of 25 Crude oils contains chain of carbon and hydrogen, what are these chains called? Hydrocarbons 15 of 25 Are all Hydrocarbon chain in crude oil the same length? No, they have different lengths 16 of 25 What do we mostly use crude oil for? Fuel 17 of 25 What process is used to refine crude oil? Fractional distillation 18 of 25 In Nanotechnology what size are the objects being studied? Very small,(1 to 100 nanometres in size) 19 of 25 What are the two main uses of salt? In the food industry for taste and for clearing ice/snow from roads. 20 of 25 Where do we obtain salt from? Underground salt deposits and the sea. 21 of 25 Name two traditional sources of alkali. Burnt wood and stale urine 22 of 25 What is chlorine used for? To kill microorganisms in water and it is the main component of bleach 23 of 25 Brine (salt water) contains Sodium Chloride, what process can we use to remove the chlorine? Electrolysis 24 of 25 What 3 elements is PVC made from? Carbon, Hydrogen and Chlorine 25 of 25
Chemistry C7 Notes Completed + Highlighted (Excess) - OCR 21st Century, 2011 Specification 5.0 / 5 based on 1 rating Teacher recommended
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