Which of the following statements is false during the adsorption of gas molecules on a metal surface?

Adsorption is always

The following chromatogram was developed by adsorption of compound '$A$' on a $6 \ cm$ $TLC$ glass plate. The retardation factor $(R_f)$ of the compound '$A$' is $.......... \times 10^{-1}$.

When temperature is increased,what happens to the extent of adsorption in physisorption?

To form a complete monolayer of acetic acid on $1 \ g$ of charcoal,$100 \ mL$ of $0.5 \ M$ acetic acid was used. Some of the acetic acid remained unadsorbed. To neutralize the unadsorbed acetic acid,$40 \ mL$ of $1 \ M$ $NaOH$ solution was required. If each molecule of acetic acid occupies $P \times 10^{-23} \ m^2$ surface area on charcoal,the value of $P$ is $\qquad$
[Use given data : Surface area of charcoal $= 1.5 \times 10^2 \ m^2 \ g^{-1}$; Avogadro's number $(N_A) = 6.0 \times 10^{23} \ mol^{-1}$]

Which of the following is used for the adsorption of moisture?