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IGCSE CHEMISTRY

CHAPTER 14

QuestionAnswer
What is used in the production of ethanol from ethene? Steam
Which term describes the formation of ethanol from glucose? Fermentation
Name one statement about ethanol? It is the only product when ethene reacts with steam.
Ethanol can be formed by...... 1 Fermentation 2 Reaction between steam and ethene 3. Catalytic addition of steam to ethene
Describes the four production of ethanol and its properties? 1. Can be made from Glucose 2. Can be made from ethene 3. Is used as a fuel 4. Is used as a solvent
Name one statement about the names of organic compounds? The compound of formula C2H5OH is an alcohol
Ethanol is manufactured from petroleum by reacting ethene with steam. Name three statement. 1 Ethene is obtained from the cracking of alkanes. 2 The reaction is an addition reaction. 3 The rate of reaction is increased by a catalyst.
Ethene reacts with Y to produce ethanol. ethene + Y → ethanol What is Y? Steam
Ethanol is made by fermentation. How is ethanol obtained from the fermentation mixture? Fractional distillation
Ethanol can be manufactured from substance X. substance X + steam - catalyst - ethanol What is substance X? Ethene
The equation shows an industrial process. H2O + C2H4 What is the name of compound X? Ethanol
Ethanol is produced from either ethene or sugar. Which type of chemical reaction is used Ethene → ethanol = addition Sugar → ethanol = fermentation
Which process is not used during the production of ethanol? Reacting ethane with oxygen
When glucose is fermented, ethanol is formed together with........ Carbon dioxide
What is not essential for the formation of ethanol by fermentation? Light
Name three formulas is that of an alkene? 1 C2H6 2 C3H8 3 C4H10
Name one statement about alkane molecules They burn in oxygen
Name two statement about alkanes They form carbon dioxide and water on combustion They are saturated.
Show the equation represents incomplete combustion of ethane 2C2H6 + 5O2 → 4CO + 6H2O
What is the main constituent of natural gas? Methane
Compound Q decolourises bromine water. Compound Q has two carbon atoms in each molecule. Name one statement about compound Q. It is produced by cracking alkanes
A hydrocarbon W burns to form carbon dioxide and water. W decolourises bromine water. What is the name of W Ethene
Which reaction is used as a test for alkenes? Alkenes decolourise aqueous bromine
Liquid W burns completely to give carbon dioxide and water. Liquid W is a compound containing carbon, hydrogen and oxygen. A solution of liquid W in water is pH 7. What is liquid W? Ethanol
Hydrocarbons obtained by fractional distillation of petroleum can be cracked to make useful products. Which substance could not be obtained by cracking propane, Mr 44? C4H8
X, Y and Z are three hydrocarbons. X C 2=CH2 Y CH3–CH=CH2 Z CH3–CH2–CH=CH2 What do compounds X, Y and Z have in common? 1 They are all alkenes. 2 They are all part of the same homologous series
Which hydrocarbon reacts with steam to produce ethanol? C2H4
19 Alkenes have the general formula CnH2n. Name one alkene? C3H6
Name two products would decolourise bromine water? 1 C2H4 2 C3H6
Which element is not added to a fertiliser? Phosphorus
Describe this polymer? A saturated compound called poly(ethene)
Name three statement about carboxylic acids? 1 Aqueous ethanoic acid has a pH below pH 7. 2 They contain the functional group –COOH. 3 They produce carbon dioxide when reacted with a metal carbonate.
Name the properties of a dilute solution of ethanoic acid? It has a pungent smell and appearance are colourless
Name three statements for ethanoic acid? 1 It contains a carbon-oxygen double bond. 2 It contains two carbon atoms. 3 It contains an –OH group.
Show the three compounds that are in the same homologous series? 1 CH3OH 2 CH3CH2OH 3 C 3CH2CH2OH
Ethene, propene and butene are all members of the same homologous series. Which statement explains why ethene, propene and butene have similar chemical properties? They all have the same functional group
The main constituent of natural gas is hydrocarbon X. To which homologous series does X belong and how many atoms are in one molecule of X? Homologous series - Alkane How many atoms - 5
In which reaction could one of the products belong to the same homologous series as the organic reactant? Cracking of an alkane
Which group of compounds is part of a homologous series? CH3OH, C2H5OH, C3H7OH
Butene and hexene belong to the same homologous series. What is the same for butene and hexene? Functional group
Which bond is not in a molecule of ethanoic acid? C=O
Increasing the number of atoms in one molecule of a hydrocarbon increases the amount of energy released when it burns. What is the correct order? Methane to Ethene
The list gives the names of four organic compounds. ethane ethanoic acid ethanol ethene Which bond do all four compounds contain? C–H
Organic compounds may have names ending in -ane, -ene, -ol or -oic acid. How many of these endings indicate the compounds contain double bonds in their molecules? 2
Name three statements of molecule of an organic 1 A solution of W in water reacts with sodium hydroxide solution. 2 When copper(II) carbonate is added to a solution of W in water, a gas is produced. 3 When magnesium is added to a solution of W in water, a gas is produced
Which terms describe a polymer? A saturated compound called poly(ethene)
Describes the two formation of a polymer? Menomer - Ethene Polymer - Poly(Ethene)
Which process does not produce carbon dioxide? Polymerisation of ethene
Created by: Haridus Academy
 

 



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