A urea molecule contains
a.two nitrogen atoms
b.two carbon atoms
c.two hydrogen atoms
d.more than one correct response
e.no correct response
The correct answer and explanation is :
The correct answer is:
a. two nitrogen atoms
Explanation:
Urea is an organic compound with the chemical formula CO(NH₂)₂. It consists of:
- One carbon (C) atom
- One oxygen (O) atom
- Two nitrogen (N) atoms
- Four hydrogen (H) atoms
Each nitrogen atom is part of an amine group (-NH₂), which is attached to the central carbonyl (C=O) group. This structure makes urea the simplest diamide of carbonic acid.
Why the other options are incorrect:
- Option b (two carbon atoms) → Incorrect. Urea has only one carbon atom, located in the center of the molecule.
- Option c (two hydrogen atoms) → Incorrect. Urea contains four hydrogen atoms (two from each amine group).
- Option d (more than one correct response) → Incorrect. Only option a is correct.
- Option e (no correct response) → Incorrect, as option a is correct.
Importance of Urea:
Urea is a crucial nitrogen-containing compound in metabolism and is the primary way humans and other mammals excrete nitrogen. It is also widely used in fertilizers, plastics, and chemical synthesis.
