Chemistry C6 - natural fats and oils 0.0 / 5 ? ChemistryNatural fats and oilsGCSEOCR Created by: aliceinwonderland2000Created on: 29-09-15 19:22 What is the chemical name for the ester that is made when methanol reacts with ethanoic acid? Methyl Ethanoate 1 of 25 What type of chemical are all naturally occuring fats and oils made from? Glycerol 2 of 25 What is special about the carbon-carbon bonds in SATURATED fats and oils? They contain only single carbon bonds 3 of 25 What is special about the carbon-carbon bonds in UNSATURATED fats and oils? They contain at least one double carbon bond 4 of 25 What is special about the bonds in MONOUNSATURATED fats and oils? The fat or oil only contains ONE double bond between the carbons 5 of 25 What is special about the bonds in POLYUNSATURATED fats and oils? They contain MORE THAN ONE double bond between the carbons 6 of 25 Name the chemical that can be used to test a fat or oil for double bonds (unsaturated)? Bromine water 7 of 25 What type of bonds in fats and oils will react with Bromine water? Double bonds 8 of 25 What will happen to the Bromine water if it reacts with a double bond? The Bromine water will lose its colour 9 of 25 Why do saturated fats present a health problem? Becasue they can contribute to the build up of cholestrol 10 of 25 What effect might the overconsumption of saturated fats and oils have on a persons health? It can lead to the hardening of arteries and veins, which could lead to heart problems 11 of 25 Why should you try and reduce the intake of saturated fats and oils? Because it will reduce the risk of heart diseae 12 of 25 Why are unsatured fats and oils healthier than saturated ones? Becuse they don't contribute to the build up of cholestrol 13 of 25 Which type of unsaturated fats and oils are healthiest to consume? Polyunsaturated fats an oils 14 of 25 How is margarine made? It is made by adding hydrogen to unsaturated oils in a catalyst which makes the liquid oil become more saturated and solid 15 of 25 What is the reaction used in making margarine called? Hydrogenation 16 of 25 Why do we describe water and oil as IMMISCIBLE liquids? Because they do not mix 17 of 25 What type of emulsion is milk? tiny droplets of oil in water. 18 of 25 What happens to the fats and oils in milk if it is left to stand? They seperate out as a layer on the top of the milk 19 of 25 What type of emulsion is butter? A water in oil emulsion 20 of 25 Describe how a commercial soap is made By splitting up natural fatsand oils with a strong alkali such as sodium hydroxide 21 of 25 What two new chemicals are formed when a hot concentrated sodium hydroxide solution is used to break up oil or fat? Soap and glycerol 22 of 25 What is this process called? Saponification 23 of 25 What is the word equation for the reaction that makes soap? Fat+sodium hyrdroxide=soap+glycerol 24 of 25 What is the name of the reaction that breaks up the ester bond, effectivley reacting it with water? Hydrolysis 25 of 25
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