Plant Oils 2 4.0 / 5 based on 1 rating ? ChemistryPaints and oilsGCSEAQA Created by: ZaraCreated on: 13-01-13 18:57 What do unsaturated oils contain between some of the carbon atoms in their carbon chains? Double bonds 1 of 21 How does an unsaturated oil decolourise bromine water? As the bromine water opens up the double bond joins on 2 of 21 How many C=C double bonds do monounsaturated fats contain in their carbon chains? One 3 of 21 How many C=C double bonds do polyunsaturated fats contain? More than one 4 of 21 What are unsaturated vegetable oils at room temperature? Liquid 5 of 21 How can unsaturated vegetable oils be hardened? By reacting them with hydrogen in the presence of a nickel catalyst at about 60'C 6 of 21 What is hardening unsaturated vegetable oils called? Hydrogenation 7 of 21 Do hydrogenated oils have a higher orlower melting point? Higher melting points 8 of 21 Having a higher melting point means the oil is ....... at room temperature? Solid 9 of 21 What are hydrogenated oils used for? Spreads and for baking cakes and pastries 10 of 21 What is margarine usually made from? Partially hydrogenated vegetable oil 11 of 21 What is used instead of butter in processed foods, e.g. biscuits Partially hydrogenated vegetable oils 12 of 21 What's good about partially hydrogenated vegetabe oils? They are a lot cheaper than butter and they keep longer 13 of 21 What does this do to biscuits? Makes them cheaper and gives them a long shelf life 14 of 21 What is a disadvantage of partially hydrogenated vegetable oils? Means you end up thus a lot of trans fats - which are very bad for you 15 of 21 Is vegetable oil saturated or unsaturated? Unsaturated 16 of 21 Is animal fat saturated or unsaturated? Saturated 17 of 21 Are saturated fats healthier or unhealthier than unsaturated fats? Unhealthier 18 of 21 Why is this? Saturated fats increase the amount of cholesterol in the blood, which can block up the arteries and increase the risk of heart disease) 19 of 21 What do natural unsaturated fats such as olive oil and sunflower oil do to the amont of blood cholesterol? They reduce the amount of blood cholesterol 20 of 21 What can eating partially hydrogenated vegetable oils do? Increase the risk of heart disease 21 of 21
Comments
No comments have yet been made