Question

please tell me me reason of three questions

Answer 1

First one because it is highly compressible

Answer 2

The first one is because gases have very less intermolecular force of attraction and the intermolecular space is very large so it fills the whole container as it has no fixed shape.

The second one is because On Kelvin scale the temperature is set at -273.15 when it is absolute zero, beyond which the temperatures cannot go. Thus, the scale unlike others starts at zero which is the lowest temperature on the scale. As lowest value on the Kelvin scale is zero, hence all figures are in positive value.

The third one is because since the intermolecular space is quite large the density of the gas is also lower.