The displayed formula of an organic compound is shown below.
What is the systematic name of this organic compound?
Propyl propanoate
Propyl butanoate
Butyl propanoate
Butyl butanoate
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The displayed formula of an organic compound is shown below.
What is the systematic name of this organic compound?
Propyl propanoate
Propyl butanoate
Butyl propanoate
Butyl butanoate
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Equal amounts of the four compounds are added to the same volume of water.
Which compound would produce the most acidic solution?
CH3CONH2
CH3COOH
CH3COOCH3
CH3COCl
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Esters can be hydrolysed under acidic or alkaline conditions.
Which statement about the hydrolysis of esters is correct?
The alkaline hydrolysis of an ester is a reversible reaction
The acid hydrolysis of an ester uses sodium hydroxide under reflux
The alkaline hydrolysis of an ester produces the parent carboxylic acid and alcohol
The acid hydrolysis of an ester does not go to completion
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Organic reactions can be completed by the use of acyl chlorides or acid anhydrides instead of carboxylic acids.
Which reason about the use of acyl chlorides and acid anhydrides is correct?
Acyl chlorides are safer and quicker to use than acid anhydrides
Acid anhydrides are less reactive than acyl chlorides
Acid anhydrides produce strong, corrosive acids as a byproduct of the reaction
Acyl chlorides are less expensive than acid anhydrides
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Methanoic acid reacts with propanol in the presence of a small amount of concentrated sulphuric acid.
What is the correct name for the ester formed?
Methyl propyl sulfate
Methyl propanoate
Propyl ethanoate
Propyl methanoate
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Which alcohol could be used to prepare HCOOCH(CH3)2?
Propan-1-ol
Propan-2-ol
2-Methylpropan-2-ol
Methanol
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The structure of ester E is shown in the diagram below.
E is hydrolysed in the presence of hydrochloric acid.
Which are the products of this hydrolysis?
CH3CO2H and (CH3)2CHCH2CH2CHO
CH3CO2H and (CH3)2CHCH2CH2OH
CH3COCl and (CH3)2CHCH2CH2OH
CH3CHO and (CH3)2CHCH2CH2OH
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Which of the following compounds could be used to produce ethyl propanoate?
(CH3CH2CO)2O |
CH3CH2CHO |
CH3CH2CH2OH |
|
A |
✓ |
✓ |
✓ |
B |
✓ |
✓ |
x |
C |
x |
✓ |
✓ |
D |
✓ |
x |
x |
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The structure of the analgesic ibuprofen is shown below:
Which of the following is not a correct statement about ibuprofen?
It will react with alcohols to produce an ester
It will react with magnesium oxide to form a salt
It will react with sodium carbonate solution
It has geometric isomers
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A student added equal amounts of four compounds to the same volume of water and measured the resulting pH.
Which compound would have produced the solution with the lowest pH?
CH3CH2CONH2
CH3CH2COOH
CH3CH2COOCH3
CH3CH2COCl
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This question is about triesters with identical alkyl (R) groups. The triester is shown below.
1, 2 and 3
Only 1 and 2
Only 2 and 3
Only 1
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A student investigated the extent to which propyl butanoate was hydrolysed. The carboxylic acid extracted from 3.50 g of propyl butanoate reacted with 23.50 cm3 of 0.20 mol dm-3 sodium hydroxide.
What percentage of propyl butanoate was hydrolysed?
1.75 %
15.31 %
17.46 %
34.91 %
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N-(4-hydroxyphenyl)ethanamide is commonly known as paracetamol.
Which statement(s) is/ are correct?
1, 2 and 3
Only 1 and 2
Only 2 and 3
Only 1
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Below is the structure of three molecules, X, Y and Z.
Which statement is correct?
The IUPAC name for molecule X is methylbutanoate.
On addition of NaHCO3, molecule X will effervesce.
In the dissociation reaction of Y, the value of Kc is close to 1.
Molecule Z has a chain isomer that is optically active.
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Propanoyl chloride takes part in the following reactions:
Which statement(s) is/are correct?
1, 2 and 3
Only 1 and 2
Only 2 and 3
Only 1
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