Which of the following is $NOT$ a characteristic of chemisorption?

The given graphs $I$,$II$,$III$,and $IV$ represent general trends observed for different physisorption and chemisorption processes under mild conditions of temperature and pressure. Which of the following choice$(s)$ about $I$,$II$,$III$,and $IV$ is (are) correct?
$(A)$ $I$ is physisorption and $II$ is chemisorption
$(B)$ $I$ is physisorption and $III$ is chemisorption
$(C)$ $IV$ is chemisorption and $II$ is chemisorption
$(D)$ $IV$ is chemisorption and $III$ is chemisorption

The correct statement for both the processes of physisorption and chemisorption is

Which of the following statements is correct for the Freundlich adsorption isotherm?

Which of the following is not a characteristic of chemisorption?

According to the Langmuir adsorption isotherm,which of the following plots is a straight line?