Question

-273 is hypothetical temperature at which volume of the gas would become zero. Why this temperature has never been achieved?

Answer 1

go to http://en.wikipedia.org/wiki/Absolute_zero
you might get some explanation.

Answer 2

ok 1 more question

Answer 3

Beyond a certain temperature gases can not be liquified whatever the pressure may be, justify the statement.

Answer 4

http://chemwiki.ucdavis.edu/Physical_Chemistry/Physical_Properties_of_Matter/Phase_Transitions/Phase_Diagrams
http://en.wikipedia.org/wiki/Supercritical_fluid
Indeed, as you say, but the state is not gas nor liquid.

Answer 5

can you please justify the statement here so i just copy it down in my notebook?