Question

The ratio of nitrogen and hydrogen atoms in one molecule of ammonia is

• A. 1 : 3
• B. 3 : 1
• C. 1 : 2
• D. 2 : 1

Hint:

Remember: Water (H$_2$O) = 2:1 (H:O), Carbon dioxide (CO$_2$) = 1:2 (C:O), Ammonia (NH$_3$) = 1:3 (N:H).

Answer 1

The Correct Option is A

Step 1: Molecular Formula of Ammonia:
Ammonia is represented as NH$_3$. This means:
1 atom of nitrogen (N).
3 atoms of hydrogen (H).
Step 2: Ratio:
Thus, the ratio of nitrogen to hydrogen is: \[ N : H = 1 : 3 \] Step 3: Importance:
Ammonia is widely used in fertilizers (urea, ammonium nitrate).
It plays a major role in the nitrogen cycle in nature.
The ratio 1 : 3 also shows the covalent bonding between N and three H atoms.
Step 4: Final Answer:
The ratio of nitrogen and hydrogen atoms in NH$_3$ is 1 : 3.