Answer:
The correct answer is B. 1-propanamine.
Step-by-step explanation:
Amines can form hydrogen bonds with water molecules, which makes them soluble in water. The more hydrogen bonding sites an amine has, the more soluble it will be in water.
Out of the given options, 1-propanamine has only one carbon chain, which allows it to form more hydrogen bonds with water molecules compared to amine molecules with longer carbon chains. Also, it does not have any other functional groups that could interfere with hydrogen bonding. Therefore, 1-propanamine would be the most soluble in water.
Further Explanation:
- A. N-ethylaniline - contains a nonpolar aromatic ring that can interfere with hydrogen bonding and reduce solubility in water.
- B. 1-propanamine - has only one carbon chain, allowing it to form more hydrogen bonds with water molecules.
- C. Propanediamine - has two amine groups that can form hydrogen bonds with water molecules, but it also has a longer carbon chain that can interfere with hydrogen bonding and reduce solubility in water.
- D. N,N-dimethylpropanamine - has two methyl groups that can interfere with hydrogen bonding and reduce solubility in water.
- E. N,N-diphenylaniline - contains two bulky aromatic rings that can interfere with hydrogen bonding and reduce solubility in water.
Hope it helps!