Chemistry C1 6.1 Extracting vegetable oil. 0.0 / 5 ? ChemistryCooking and food additivesGCSEAQA Created by: Atlanta and JacobCreated on: 10-07-16 00:05 How and from where can vegetable oils be extracted? Seeds, nuts and fruits by pressing or by distillation. 1 of 12 Why are vegetable oils important foods? They provide nutrients and a lot of energy. 2 of 12 What can vegetable oils be used to make? Biofuels. 3 of 12 What is he structure of unsaturated oils and what is the test for them? They contain carbon-carbon double bonds (C=C) and decolourise bromine water (from orange to colourless). 4 of 12 What are some seeds, nuts and fruits rich in? Vegetable oils. 5 of 12 What is the process of extracting vegetable oil by crushing and pressing? The plant material is crushed and pressed, followed by removing water and other impurities. 6 of 12 What is the process of extracting vegetable oil by distillation? The plant material is mixed with water to produce a mixture of oil and water from which the oil can be separated. 7 of 12 What are the molecules in vegetable oils made of? Hydrocarbon chains. 8 of 12 What are vegetable oils with several double bonds in each molecule called? Polyunsaturated. 9 of 12 What two methods are used to extract vegetable oils? Crushing and pressing; and distillation (with water/steam). 10 of 12 Why are vegetable oils important foods? They provide energy and nutrients. 11 of 12 Why are some vegetable oils described as unsaturated? Their molecules have carbon-carbon double bonds. 12 of 12
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