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Organic chemistry quiz (unit 4)
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Perguntas do quiz (18)
1In the formation of nitrobenzene from benzene, what is the role of the nitronium ion?
- ANucleophile
- BElectrophile
- CCatalyst
- DReducing agent
2Which of the following will produce effervescence when added to sodium hydrogencarbonate?
- AEthanoyl chloride
- BEthanol
- CEthanoic acid
- DEthanoic anhydride
3What catalyst is used in Friedel-Crafts acylation reactions?
- AConcentrated sulphuric acid
- BIron
- CConcentrated phosphoric acid
- DAluminium chloride
4Which TWO types of reaction are involved in the formation of lactic acid from ethanal?
- ANucleophilic addition
- BNucleophilic substitution
- CElectrophilic addition
- DHydrolysis
5Which of the following is not a use of esters?
- ASoap
- BFlavourings
- CCooking oil
- DSolvents
6Kekulé 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- AKekulé's model is correct
- BBenzene is more thermodynamically stable than Kekulé's model suggests
- CBenzene is less thermodynamically stable than Kekulé's model suggests
- DBenzene is more reactive than Kekulé's model suggests
7Racemic mixtures are optically inactive.
- AVerdadeiro
- BFalso
8What is the reducing agent used to reduce aldehydes and ketones to alcohols?
- AHydrogen
- BSodium tetrahydridoborate(III)
- CTollens' reagent
- DAcidifed potassium dichromate(VI)
9Which of the following are products of a Friedel-Crafts acylation reaction?
- AHydrochloric acid
- BWater
- CAcyl chloride
- DAromatic ketone
- EBenzene
- FAcylium ion
- GTetrachloroaluminate ion
10A chiral compound is one which exhibits geometric isomerism.
- AVerdadeiro
- BFalso
11Which of the following is NOT a reason why ethanoic anhydride is preferred over ethanoyl chloride in the industrial synthesis of aspirin?
- AEthanoic anhydride reacts more easily with salicylic acid.
- BEthanoic anhydride is cheaper.
- CEthanoic anhydride is safer.
- DEthanoic anhydride does not react easily with water.
12What is the reduction product of the reaction of an aldehyde with Tollens' reagent?
- AA carboxylic acid
- BA primary alcohol
- CSilver
- DAmmonia
13Benzene will undergo which of the following reactions?
- ANucleophilic substitution
- BNucleophilic addition
- CElectrophilic substitution
- DElectrophilic addition
14What mechanism is involved in the reduction of ketones to secondary alcohols?
- AElimination
- BElectrophilic addition
- CNucleophilic substitution
- DNucleophilic addition
15Ethanoic anhydride is more reactive than ethanoyl chloride.
- AVerdadeiro
- BFalso
16When 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?
- AThe enantiomers reflect polarised light in opposite directions
- BEnzymes are specific to optical isomers, so one of them is likely to be ineffective
- COne of the isomers may have harmful side effects
- DRacemates are toxic
- ELaboratory reactions should never produce racemates
17Positive enantiomers reflect a plane of polarised light anticlockwise.
- AVerdadeiro
- BFalso
18What are the products of the reaction of 1-ethylpropylbenzoate with water?
- APhenol and 2-methylbutanoic acid
- BPentan-3-ol and benzoic acid
- CPentan-2-ol and benzoic acid
- DPropanol and 1-ethylbenzoic acid
Informações
- Descrição
- A-Level Chemistry (Organic chemistry) Quiz sobre Organic chemistry quiz (unit 4), criado por Stephen Cole em 11-08-2014.
- Autor
- Stephen Cole
- Idioma
- English
- Visualizações
- 109
- Histórico
- Criado em 11 ago 2014 · atualizado em 19 ago 2016
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