1136389
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Quiz von Stephen Cole, aktualisiert more than 1 year ago
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Erstellt von Stephen Cole
vor mehr als 10 Jahre
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Frage 1
Frage
In the formation of nitrobenzene from benzene, what is the role of the nitronium ion?
Antworten
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Nucleophile
-
Electrophile
-
Catalyst
-
Reducing agent
Frage 2
Frage
Which of the following will produce effervescence when added to sodium hydrogencarbonate?
Antworten
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Ethanoyl chloride
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Ethanol
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Ethanoic acid
-
Ethanoic anhydride
Frage 3
Frage
What catalyst is used in Friedel-Crafts acylation reactions?
Antworten
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Concentrated sulphuric acid
-
Iron
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Concentrated phosphoric acid
-
Aluminium chloride
Frage 4
Frage
Which TWO types of reaction are involved in the formation of lactic acid from ethanal?
Antworten
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Nucleophilic addition
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Nucleophilic substitution
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Electrophilic addition
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Hydrolysis
Frage 5
Frage
Which of the following is not a use of esters?
Antworten
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Soap
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Flavourings
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Cooking oil
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Solvents
Frage 6
Frage
Kekulé suggested that benzene had the structure cyclohexa-1,3,5-triene.
The enthalpy of hydrogenation of cyclohexene is -120kJ/mol, and that of benzene is -208kJ/mol.
This shows that
Antworten
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Kekulé's model is correct
-
Benzene is more thermodynamically stable than Kekulé's model suggests
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Benzene is less thermodynamically stable than Kekulé's model suggests
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Benzene is more reactive than Kekulé's model suggests
Frage 7
Frage
Racemic mixtures are optically inactive.
Antworten
- True
- False
Frage 8
Frage
What is the reducing agent used to reduce aldehydes and ketones to alcohols?
Antworten
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Hydrogen
-
Sodium tetrahydridoborate(III)
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Tollens' reagent
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Acidifed potassium dichromate(VI)
Frage 9
Frage
Which of the following are products of a Friedel-Crafts acylation reaction?
Antworten
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Hydrochloric acid
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Water
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Acyl chloride
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Aromatic ketone
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Benzene
-
Acylium ion
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Tetrachloroaluminate ion
Frage 10
Frage
A chiral compound is one which exhibits geometric isomerism.
Antworten
- True
- False
Frage 11
Frage
Which of the following is NOT a reason why ethanoic anhydride is preferred over ethanoyl chloride in the industrial synthesis of aspirin?
Antworten
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Ethanoic anhydride reacts more easily with salicylic acid.
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Ethanoic anhydride is cheaper.
-
Ethanoic anhydride is safer.
-
Ethanoic anhydride does not react easily with water.
Frage 12
Frage
What is the reduction product of the reaction of an aldehyde with Tollens' reagent?
Antworten
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A carboxylic acid
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A primary alcohol
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Silver
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Ammonia
Frage 13
Frage
Benzene will undergo which of the following reactions?
Antworten
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Nucleophilic substitution
-
Nucleophilic addition
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Electrophilic substitution
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Electrophilic addition
Frage 14
Frage
What mechanism is involved in the reduction of ketones to secondary alcohols?
Antworten
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Elimination
-
Electrophilic addition
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Nucleophilic substitution
-
Nucleophilic addition
Frage 15
Frage
Ethanoic anhydride is more reactive than ethanoyl chloride.
Antworten
- True
- False
Frage 16
Frage
When synthesising drugs, manufacturers often find that they make a racemate due to the chirality of the drug. The enantiomers can be hard to separate. For what TWO reasons is this a problem?
Antworten
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The enantiomers reflect polarised light in opposite directions
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Enzymes are specific to optical isomers, so one of them is likely to be ineffective
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One of the isomers may have harmful side effects
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Racemates are toxic
-
Laboratory reactions should never produce racemates
Frage 17
Frage
Positive enantiomers reflect a plane of polarised light anticlockwise.
Antworten
- True
- False
Frage 18
Frage
What are the products of the reaction of 1-ethylpropylbenzoate with water?
Antworten
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Phenol and 2-methylbutanoic acid
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Pentan-3-ol and benzoic acid
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Pentan-2-ol and benzoic acid
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Propanol and 1-ethylbenzoic acid
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