Co2
Compressible, Low Viscosity (compared to a liquid)
Gas is compressible and will expand to fill any container it is put in. Liquid is not compressible and will maintain a fixed volume regardless of the container it is in.
Yes, Liquid -Liquid displacement is easier than displacement with gas. the liquids cannot be compressible, but gas can. the volume of gas required for displacement is lower than volume of liquid.
It depends on the element or compound that you are working with. Try wikipedia.
Butane gas is compressible. It can be compressed into a smaller volume at higher pressures.
Mercury, aka: "Quick Silver"
Gas is the most compressible because the atoms have the most space in between. Solids are the least compressible because their atoms are tightly packed. Degree of compressibility will depend entirely on the substance in question.
All gases are compressible. Depending on their state. Oxygen can be a gas, a solid or a liquid. Liquid oygen (very very cold) would not be compressible, solid oxygen (frozen) would not either but as a gas at standard conditions - room temperature and pressure - it can be compressed. For example, compressed oxygen is used in emergency vehicles to keep people alive if they are injured or sick. It is extremely flammable, almost explosive so no smoking near a compressed oxygen gas cylinder, OK?
the air will be in liquid state when its pressure is increased and its temparature is decreased. eg: CNG is highly compressible gas.
No, it is a liquid.
Fluids include liquids and gasses. Liquids are not compressible. Gasses are compressible. Water is a liquid and it not compressible.
The expeiment is simple: under an applied pressure the volume of a gas decrease.