Which type of bond is involved in the phenomenon of physical adsorption?

In Freundlich adsorption isotherm,the value of $1/n$ is

During adsorption,the $\Delta H$ is negative and the magnitude of this negative value

If $x$ gram of gas is adsorbed by $m$ gram of adsorbent at pressure $P$,the plot of $\log \frac{x}{m}$ versus $\log P$ is linear. The slope of the plot is: ($n$ and $k$ are constants and $n > 1$ )

Which of the following statements is correct for physisorption?

Which of the following represents the Freundlich adsorption isotherm equation?