Question

What do u mean by critical temperature?

Answer 1

the temperature of a gas in its critical state, above which it cannot be liquefied by pressure alone.

I hope it will help you.

Answer 2

hey mate  ,

   here is your answer :)

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the highest temperature at which a substance can exist as a liquid , is called its critical temperature .  

e.g  

critical temperature of carbon dioxide is 31.142 degree centigrade