876540
Questão 1
Questão
Which type of formula shows what is attached to each carbon atom in symbols?
Responda
-
Empirical formula
-
Structural formula
-
Displayed formula
Questão 2
Questão
Which type of formula shows organic molecules in diagrammatic form?
Responda
-
Empirical formula
-
Structural formula
-
Displayed formula
Questão 3
Questão
What is the functional group of alcohols?
Responda
-
R-OH
-
R-COO-R
-
R-COOH
Questão 4
Questão
What is the functional group of carboxylic acids?
Responda
-
R-OH
-
R-COO-R
-
R-COOH
Questão 5
Questão
What is the functional group of esters?
Responda
-
R-OH
-
R-COO-R
-
R-COOH
Questão 6
Questão
True or false? A homologous series is a set of organic compounds with the same functional group.
Responda
- True
- False
Questão 7
Questão
What is the main alcohol in alcoholic drinks?
Responda
-
Methanol
-
Ethanol
-
Propanol
-
Butanol
Questão 8
Questão
Which of these are uses of alcohols?
Responda
-
Beverages
-
Solvents in perfumes
-
Vinegars
-
Flavourings and scents in perfumes
Questão 9
Questão
True or false? Ethanol does not burn cleanly.
Responda
- True
- False
Questão 10
Questão
True or false? The reaction of sodium with alcohols is more vigorous than with water.
Responda
- True
- False
Questão 11
Questão
How can we oxidise alcohols into carboxylic acids?
Responda
-
Reaction with potassium permanganate
-
Boiling with acidified potassium dichromate
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Fermentation with yeast
-
Action of microbes in the air
Questão 12
Questão
Which of these are uses of carboxylic acids?
Responda
-
Beverages
-
Vinegars
-
Solvents in perfumes
-
Flavourings and scents in perfumes
Questão 13
Questão
Which of these are uses of esters?
Responda
-
Beverages
-
Vinegars
-
Solvents in perfumes
-
Flavourings and scents in perfumes
Questão 14
Questão
What two homologous series react to form esters?
Responda
-
Alkanes
-
Alkenes
-
Alcohols
-
Aldehydes
-
Ketones
-
Carboxylic acids
Questão 15
Questão
True or false? Carboxylic acids do not dissociate completely with H+ ions in solution and are weak acids.
Responda
- True
- False
Questão 16
Questão
Which acid is used as a catalyst when forming esters?
Responda
-
Hydrochloric acid
-
Acetic acid
-
Sulphuric acid
-
Nitric acid
Questão 17
Questão
Which of these are negative consequences of alcohol usage?
Responda
-
Cirrhosis of the liver
-
Slowed reaction times
-
Muscular atrophy
-
Increased violent behaviour
Questão 18
Questão
Why is it difficult to distil ethanol from methylated spirits?
Responda
-
Methylated spirits contain only 0.01% ethanol
-
Methylated spirits contain many compounds with similar boiling points
-
Methylated spirits do not distil very well
Questão 19
Questão
True or false? Ethanol cannot be used as a biofuel.
Responda
- True
- False
Questão 20
Questão
True or false? Some people are opposed to biofuels as they argue that the land needed could be better used for food.
Responda
- True
- False
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