1. A certain mass of gass occupied 850 ml at a pressure of 760 mm of Hg. on increasing the pressure it was found that the volume of the gas was 75% of its initial value. Assuming constant temperature, find the final pressure of the gas?

2.It is required to reduce the volume of gas by 20% by compressing it at a constant pressure. To do so, the gas has to be coled. If the gas attains a final temperature of 157 degree C, find the initial temperature of the gas?

3.At a given temperature the pressure of a gas reduces to 75% of its initial value and the volume increases by 40% of its initial value. Find this temperature if its initial temperature was -10 degree C.

4.At 0 degree C and 760 mm of Hg, a gas occupies a volume of 100 cc. The Kelvin temperature of the gas is increased by one-fifth while the pressure is increased one and a half times. calculate the final volume of the gas