Correct for physical adsorption is

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(B) Physical adsorption is a spontaneous process,which implies that the change in Gibbs free energy,$\Delta G$,must be negative $(\Delta G < 0)$.Durin

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$\Delta G = -ve$

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(B) Physical adsorption is a spontaneous process,which implies that the change in Gibbs free energy,$\Delta G$,must be negative $(\Delta G During adsorption,the gas molecules are trapped on the surface of the adsorbent,leading to a decrease in randomness,so $\Delta S$ is negative $(\Delta S Adsorption is an exothermic process,meaning heat is released,so the enthalpy change,$\Delta H$,is negative $(\Delta H Therefore,the correct statement is $\Delta G = -ve$.

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