Which of the following statements is not correct in respect of chemisorption?

When $O_{2}$ is adsorbed on a metallic surface,electron transfer occurs from the metal to $O_{2}$. The $TRUE$ statement$(s)$ regarding this adsorption is(are)
$(A)$ $O_{2}$ is physisorbed
$(B)$ heat is released
$(C)$ occupancy of $\pi_{2p}^{*}$ of $O_{2}$ is increased
$(D)$ bond length of $O_{2}$ is increased

The adsorption of a gas on a solid surface varies with the pressure of the gas in which of the following manners?

$100 \ mL$ of $0.6 \ M$ acetic acid is shaken with $2 \ g$ activated carbon. The final concentration of the solution after adsorption is $0.5 \ M$. The amount of acetic acid adsorbed per gram of carbon is $... \ g$.

The curve that best describes the adsorption of a gas $(x \, g)$ on $1.0 \, g$ of a solid substrate as a function of pressure $(p)$ at a fixed temperature is

For Freundlich adsorption isotherm,a graph of $\log (x / m)$ vs $\log (p)$ gives a straight line. The slope of the line and its $Y$-axis intercept respectively are