If the pressure on a movable piston of a closed container is doubled, the volume of gas will decrease.
Boyle's law states that if the temperature of a gas sample is constant, the volume of the sample will vary inversely as the pressure.
This means an increase in pressure will lead to a decrease in volume, also a decrease in volume will lead to an increase in pressure.
Therefore, when the pressure on the piston is doubled, the gas moves downward in the piston until the pressure produced by the gas equals the pressure produced by the piston. At this point, the volume of the gas will be reduced.
For more details on Boyle's law kindly check
https://brainly.com/question/24938688