Coding for the type of compound
5 marks · HardThe name "propan-1-ol" is given to an organic compound.
State what the code "an" in the name tells you about the carbon atoms in the chain.
Identify the homologous series to which propan-1-ol belongs, and state the code that shows this in the name.
Write the code letter that indicates the compound has three carbon atoms, and explain your answer.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
(a) All carbon–carbon bonds are single bonds
(b) Alcohols; code: ol
(c) prop; because 'prop' stands for a chain of three carbon atoms in the molecule.
Common mistakes: Confusing codes for double and single bonds; Giving wrong series for alcohols; Wrong code letters
Show mark scheme and worked solution
Marking points
B1 (a) · 1 mark · Correctly states that 'an' means all carbon–carbon bonds are single bonds
B2 (b) · 1 mark · Identifies correct homologous series: alcohols
B3 (b) · 1 mark · Identifies code for alcohols: 'ol'
B4 (c) · 1 mark · Gives correct code for three carbons: 'prop'
B5 (c) · 1 mark · Explains that 'prop' stands for three carbon atoms in the chain
Worked solution
a) The code 'an' tells you that all the carbon–carbon bonds in the chain are single bonds.
b) Propan-1-ol belongs to the homologous series of alcohols. The code that shows this is 'ol'.
c) The code 'prop' indicates the compound has three carbon atoms, because 'prop' is the code used in organic chemistry for a three-carbon chain.