Which is the correct general formula for non-cyclic compounds in the homologous series?
A alcohols
C H_n O
B aldehydes
C H_n O
C esters
C H_n O_2
D primary amines
C H_n N
- AQA - A-Level Chemistry - Question 27 - 2021 - Paper 3
Question 27
Which is the correct general formula for non-cyclic compounds in the homologous series?
A alcohols
C H_n O
B aldehydes
C H_n O
C esters
C H_n O_2
D primary amines
C... show full transcript
Worked Solution & Example Answer:Which is the correct general formula for non-cyclic compounds in the homologous series?
A alcohols
C H_n O
B aldehydes
C H_n O
C esters
C H_n O_2
D primary amines
C H_n N
- AQA - A-Level Chemistry - Question 27 - 2021 - Paper 3
Step 1
A alcohols
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The general formula for alcohols is given by the formula CnH2n+1OH, denoting that they consist of carbon, hydrogen, and a hydroxyl (−OH) group. This shows a clear representation of how the number of hydrogen atoms is proportional to the number of carbon atoms.
Step 2
B aldehydes
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Aldehydes can be represented by the general formula CnH2nO. This means they consist of carbon, hydrogen, and a carbonyl (−C=O) group at the end of the carbon chain.
Step 3
C esters
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Esters have a more complex formula, represented as CnH2nO2. They are formed from an alcohol and a carboxylic acid, and contain both carbon and oxygen in two functional groups.
Step 4
D primary amines
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The formula for primary amines is generally CnH2n+1NH2. They contain a primary nitrogen atom connected to one carbon chain.
