The number of statements,which are correct wi | vedclass

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(A) At point $(a)$,$CO_2$ exists as a gas.At point $(b)$,the liquefaction of $CO_2$ starts.At point $(c)$,the liquefaction ends.Between points $(b)$ a

Vedclass · Accepted Answer

$2$

Vedclass · Answer

(A) At point $(a)$,$CO_2$ exists as a gas.At point $(b)$,the liquefaction of $CO_2$ starts.At point $(c)$,the liquefaction ends.Between points $(b)$ and $(c)$,liquid and gaseous $CO_2$ coexist.As the volume decreases from $(b)$ to $(c)$,the amount of gas decreases and the amount of liquid increases.Evaluating the statements:$A.$ Correct: $CO_2$ remains as a gas up to point $(b)$.$B.$ Incorrect: Liquid $CO_2$ starts appearing at point $(b)$,not $(c)$.$C.$ Correct: Liquid and gaseous $CO_2$ coexist between points $(b)$ and $(c)$.$D.$ Incorrect: As the volume decreases from $(b)$ to $(c)$,the amount of liquid increases,not decreases.Therefore,there are $2$ correct statements ($A$ and $C$).

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