1136389
Description
Quiz by Stephen Cole, updated more than 1 year ago
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Created by Stephen Cole
about 10 years ago
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Question 1
Question
In the formation of nitrobenzene from benzene, what is the role of the nitronium ion?
Answer
-
Nucleophile
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Electrophile
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Catalyst
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Reducing agent
Question 2
Question
Which of the following will produce effervescence when added to sodium hydrogencarbonate?
Answer
-
Ethanoyl chloride
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Ethanol
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Ethanoic acid
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Ethanoic anhydride
Question 3
Question
What catalyst is used in Friedel-Crafts acylation reactions?
Answer
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Concentrated sulphuric acid
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Iron
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Concentrated phosphoric acid
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Aluminium chloride
Question 4
Question
Which TWO types of reaction are involved in the formation of lactic acid from ethanal?
Answer
-
Nucleophilic addition
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Nucleophilic substitution
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Electrophilic addition
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Hydrolysis
Question 5
Question
Which of the following is not a use of esters?
Answer
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Soap
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Flavourings
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Cooking oil
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Solvents
Question 6
Question
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
Answer
-
Kekulé's model is correct
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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
Question 7
Question
Racemic mixtures are optically inactive.
Answer
- True
- False
Question 8
Question
What is the reducing agent used to reduce aldehydes and ketones to alcohols?
Answer
-
Hydrogen
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Sodium tetrahydridoborate(III)
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Tollens' reagent
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Acidifed potassium dichromate(VI)
Question 9
Question
Which of the following are products of a Friedel-Crafts acylation reaction?
Answer
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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
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Acylium ion
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Tetrachloroaluminate ion
Question 10
Question
A chiral compound is one which exhibits geometric isomerism.
Answer
- True
- False
Question 11
Question
Which of the following is NOT a reason why ethanoic anhydride is preferred over ethanoyl chloride in the industrial synthesis of aspirin?
Answer
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Ethanoic anhydride reacts more easily with salicylic acid.
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Ethanoic anhydride is cheaper.
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Ethanoic anhydride is safer.
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Ethanoic anhydride does not react easily with water.
Question 12
Question
What is the reduction product of the reaction of an aldehyde with Tollens' reagent?
Answer
-
A carboxylic acid
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A primary alcohol
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Silver
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Ammonia
Question 13
Question
Benzene will undergo which of the following reactions?
Answer
-
Nucleophilic substitution
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Nucleophilic addition
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Electrophilic substitution
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Electrophilic addition
Question 14
Question
What mechanism is involved in the reduction of ketones to secondary alcohols?
Answer
-
Elimination
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Electrophilic addition
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Nucleophilic substitution
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Nucleophilic addition
Question 15
Question
Ethanoic anhydride is more reactive than ethanoyl chloride.
Answer
- True
- False
Question 16
Question
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?
Answer
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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
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Laboratory reactions should never produce racemates
Question 17
Question
Positive enantiomers reflect a plane of polarised light anticlockwise.
Answer
- True
- False
Question 18
Question
What are the products of the reaction of 1-ethylpropylbenzoate with water?
Answer
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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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