Chemistry - Chapter 6 0.0 / 5 ? SciencePlants and vegetable oilsGCSEAQA Created by: rebeccamariaCreated on: 01-04-15 17:37 What are the two methods of extracting oil? Pressing and Distillation 1 of 19 Where are vegetable oils found? In seeds and fruit 2 of 19 Process of extracting oil The plant material is crushed. Then you press the crushed plant material between metal plates and squash the oil out. 3 of 19 Why do chips cook faster in hot oil than boiling water? Because, oil boils in a higher temperature than water 4 of 19 Vegetable oil provides a lot of _____. Energy 5 of 19 What do unsaturated oils tend to be like? Liquid and runny at room temperture 6 of 19 What useful fuel is made from vegetable oil? Biodiesel 7 of 19 Is vegetable oil saturated or un-saturated? It is unsaturated because it has a double bond 8 of 19 How much carbon bonds do saturated, monounsaturated and polyunsaturated fat contain? 1) No carbon to carbon bond 2) One carbon double bond 3) More than two carbon double bonds 9 of 19 What is an emulsion? Is a mixture of water and oil (which are two things that don't mix) 10 of 19 What is mayonnaise an example of? Emulsion 11 of 19 What is an emulsifier? Emulsifiers stop the oil and water from separating into layers 12 of 19 How does an emulsifier work? An emulsifier works because the hydrophilic part is attracted to water while the hydrophobic part is attracted to oil 13 of 19 How does an emulsifier help to make good creamy sauce? It stop the oil and water from separating into layers 14 of 19 What are egg yolks an example of? Emulsifier 15 of 19 What oil can specifically be hardened and why? Unsaturated oils because, they are liquid at room temperature 16 of 19 Which chemical is needed to harden vegetable oils? Hydrogen 17 of 19 What tempature is needed for hardening of unsaturated oils? 60°C 18 of 19 What catalyst is needed for hardening? A nickel catalyst is needed for hardening 19 of 19
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