Answer:
D gas liquid
Step-by-step explanation:
The states of matter in 1 and 2 are the gas and liquid phases.
State 1; the molecules are very far apart. They move about quickly at random straight lines.
- This is an attribute of a gas.
- The particles or molecules of gases are very far apart.
- They are held together by very weak attractive forces.
- Gases are compressible
- Examples are carbon(iv) oxide, oxygen gas
State 2: the molecules are quite closely packed together. They move about at random. They do not have fixed positions.
- Liquids are held by much stronger attractive forces.
- Their molecules are closer to each other.
- They generally flow
- They are partially compressible.
Solids are the most closely held together by very strong attractive forces. Their molecules have fixed position.
Therefore, State 1 is gas and State 2 is liquid.