Question
Four properties of water are listed.
It is colorless and odorless in its pure form.
It reacts with metals to form metal hydroxide and hydrogen gas.
When heated to 100 °C, water evaporates.
It decomposes to form hydrogen and oxygen.
Which are the physical properties of water?
Answers
GPT-4o mini
The physical properties of water from the listed items are:
1. **It is colorless and odorless in its pure form.**
2. **When heated to 100 °C, water evaporates.**
The first property describes the inherent characteristics of water without changing its chemical composition, making it a physical property. The third property describes a change in state (from liquid to gas), which is also a physical change.
The other two properties are not physical:
- **It reacts with metals to form metal hydroxide and hydrogen gas** (this is a chemical property).
- **It decomposes to form hydrogen and oxygen** (this is also a chemical property).
So, the physical properties of water in your list are the first and the third statements.
1. **It is colorless and odorless in its pure form.**
2. **When heated to 100 °C, water evaporates.**
The first property describes the inherent characteristics of water without changing its chemical composition, making it a physical property. The third property describes a change in state (from liquid to gas), which is also a physical change.
The other two properties are not physical:
- **It reacts with metals to form metal hydroxide and hydrogen gas** (this is a chemical property).
- **It decomposes to form hydrogen and oxygen** (this is also a chemical property).
So, the physical properties of water in your list are the first and the third statements.