According to the Freundlich adsorption isotherm,which of the following is correct?

Physical adsorption is essentially quite appreciable:

In an adsorption experiment,a graph between $\log (x/m)$ vs $\log P$ was found to be linear with a slope of $45^{\circ}$. The intercept on the $\log (x/m)$ axis was found to be $0.3$. The amount of the gas adsorbed per gram of charcoal under a pressure of $1 \ atm$ is:

Assertion : $NH_3$ is absorbed more readily over activated charcoal than $CO_2$.
Reason : $NH_3$ is non-polar.

Freundlich adsorption isotherm gives a straight line on plotting :-

$A$ plot of $\log (x/m)$ versus $\log p$ for the adsorption of a gas on a solid gives a straight line with slope equal to