C1 6.1 C1 6.1 extracting vegetable oil 2.0 / 5 based on 1 rating ? ScienceChemistryGCSEAQA Created by: sarah-alexandraCreated on: 12-06-13 20:49 How does distillation take place? Plants are put in water and boiled. The oil and water evaporate together and are condensed. Water and other impurities are then removed. 1 of 13 What does distillation do? extracts oil from plants. 2 of 13 What other way do we extract vegetable oils? squashing the plant and removing the impurities, 3 of 13 What is this other process called? pressing 4 of 13 What do unsaturated oils contain? double bonds. 5 of 13 Why do we harden oil? To make it suitable for spreading. 6 of 13 Why are vegetable oils useful in cooking? They have a higher boiling point and therefore cook quicker and the outside is crispy. 7 of 13 What are the conditions for hardening? 60 degrees celsius nickel catalyst. 8 of 13 Why are vegetable oils bad for you? They clog up blood vessels of your heart. 9 of 13 Why are vegetable oils (unsaturated) good for you? They are a source of nutrients (e.g. vitamin E). 10 of 13 why do unsaturated oils become mostly saturated when hydrogenated? because the double bonds are broken to add hydrogen. 11 of 13 What is used to test for double bonds? bromine water 12 of 13 What other way are vegetable oils (unsaturated) good for you? They help keep your arteries clear 13 of 13
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