If there is no pressure, water will?

A. stand still

B. Move quickly

C. become warmer

D. change into gas

Here we have to choose the correct statement on the condition of water if there is no pressure.

At zero or absence pressure the water molecule remains in gaseous form only.

If the pressure is zero then the volume will be maximum as per the Boyle's law.

The change of state of a compound from gas to liquid is depend upon the probable inter-molecular interaction between the molecules. In water there remains hydrogen bond which is absent in its gaseous form (water vapor), moderately strong in liquid form (water) and highly strong in solid form (ice).

If there will be more pressure the molecules will forced to come close to each other and the possible hydrogen bond will form which will lead to the state of the water from gaseous to liquid.

However in the gaseous form the rate of movement of any molecule will be high than the liquid form.

The pressure is inversely proportional to the temperature by the Charles' law Thus if there is no pressure there will be high temperature.

Thus if there will be no pressure, water molecules will change to gas.