For the adsorption of a gas on a solid adsorbent,which of the following is positive?

The Langmuir adsorption isotherm is deduced using the assumption that:

What is the difference between physisorption and chemisorption?

$3 \, g$ of activated charcoal was added to $50 \, mL$ of acetic acid solution $(0.06 \, N)$ in a flask. After an hour,it was filtered and the strength of the filtrate was found to be $0.042 \, N$. The amount of acetic acid adsorbed (per gram of charcoal) is: .............. $mg$

The Freundlich adsorption isotherm is given by:

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