How will you show that air has maximum compressibility

1) Take three syringes and close their nozzles by rubber corks

2) Remove the pistons from all the syringes.

3) Fill two syringes with water and chalk powder separately.

4) Now, insert the pistons back into the syringes.

5) Try to compress the content by pushing the piston in each syringe.

It will be noticed that syringe having air is compressed easily as compared to other two syringes.