QUIZ- BASIC CONCEPT IN ORGANIC COMPOUNDS

1. What is the general formula for alkanes?CnH2n+1OHCnH2n+2CnHn+2CnH2n2. What is another word for formic acid?Acetic acidPropionic acidEthanoic acidMethanoic acid3. An ester is formed when carboxylic acid reacts with alcohol. What are some of the uses of esters?used in disinfectant aerosol spraysartificial flavorings and fragrancesdetergentsused in lubrication4. An alkene is formed from the cracking of petroleum. How do we differentiate between alkanes and alkenes?HydrationDehydrationHydrogenationHalogenation with decolorization5. Nylon is used in many things in our lives today. Examples are umbrellas, raincoats, fishing line, ropes and tents. Which of the following has the same linkage as nylon?VitaminsFatsProteinsCarbohydrates6. What is produced in the incomplete combustion of alkenes?oxygen and watercarbon monoxide and watercarbon dioxide and watercarbon monoxide and alcohol7. Carboxylic acid...gives off steam when reacted with magnesiumforms a salt, water and carbon dioxide when reacted with carbonateis a poor electrolyteforms a salt and hydrogen with a metal oxide8. Industrially, ethanol can be produced by the reaction of steam with ethene. This reaction is catalysed by what?finely divided ironheated zincvanadium(V) oxidephosphoric(V) acid9. What is the purpose of the condensor in the process of ethanol oxidising to ethanoic acid?prevent the escape of any unchanged ethanolprevent the reaction of the ethanoic acid with the ethanolprevent the conversion of the ethanol to etheneprevent the reforming of ethanol from the ethanoic acid10. Which reaction does not produce carbon dioxide?Combustion of methaneFermentation of sugarOxidation of ethanol to ethanoic acidReaction of ethanoic acid with calcium carbonateSOLUTION:1. What is the general formula for alkanes? The correct answer was CnH2n+2 CnH2n is the general formula for alkenes. CnH2n+1OH is the general formula for alcohol. 75% of players have answered correctly.2. What is another word for formic acid? The correct answer was Methanoic acid Formic acid is used as a preservative and antibacterial agent in livestock feed.64% of players have answered correctly.3. An ester is formed when carboxylic acid reacts with alcohol. What are some of the uses of esters? The correct answer was artificial flavorings and fragrances Examples of esters are pentyl pentanoate, ethyl acetate etc. The first word is from the alcohol while the second is from the acid group.69% of players have answered correctly.4. An alkene is formed from the cracking of petroleum. How do we differentiate between alkanes and alkenes? The correct answer was Halogenation with decolorization A halogen like bromine is added to the substance. An alkene will decolourise bromine from brown to colourless. There will be no visible change with an alkane.32% of players have answered correctly.5. Nylon is used in many things in our lives today. Examples are umbrellas, raincoats, fishing line, ropes and tents. Which of the following has the same linkage as nylon? The correct answer was Proteins They have the amide or peptide linkage. Fats and terylene both have the ester linkage.56% of players have answered correctly.6. What is produced in the incomplete combustion of alkenes? The correct answer was carbon monoxide and water If it is a complete conbustion, CO2 and H2O are formed.56% of players have answered correctly.7. Carboxylic acid... The correct answer was forms a salt, water and carbon dioxide when reacted with carbonate Any acid also has this propertiy. For example : Hydrochloric acid + sodium carbonate to give sodium chloride + water + carbon dioxide.50% of players have answered correctly.8. Industrially, ethanol can be produced by the reaction of steam with ethene. This reaction is catalysed by what? The correct answer was phosphoric(V) acid Vanadium(V) oxide is used in the manufacture of sulfuric acid.30% of players have answered correctly.9. What is the purpose of the condensor in the process of ethanol oxidising to ethanoic acid? The correct answer was prevent the escape of any unchanged ethanol The condensor changes the gas to liquid. Liquids are unable to escape but gas could escape very easily.35% of players have answered correctly.10. Which reaction does not produce carbon dioxide? The correct answer was Oxidation of ethanol to ethanoic acid Ethanoic acid is known as vinegar. Beer would turn sour if you left it open for too long because it has been oxidised to acid. Acid gives a sour taste.