Question

The list below includes some of the properties of ammonia. Identify the physical properties in the list. Check all of the boxes that apply.

gas at room temperature

strong, unpleasant odor

reacts with hydrochloric acid

dissolves easily in water

burns in oxygen

Answer 1

[✔] gas at room temperature
[✔] strong, unpleasant odor
[ ] reacts with hydrochloric acid
[✔] dissolves easily in water
[ ] burns in oxygen

Explanation: Physical properties are those observable without changing the chemical identity (state, odor, solubility). Reaction with HCl and burning are chemical changes. (Note: ammonia’s solubility is usually listed as a physical property, though it partially reacts with water to form NH4+ and OH−.)