Embibe Experts Solutions for Chapter: Surface Chemistry, Exercise 1: AP EAPCET 2019 (21-Apr Shift-2)

When an iron rod is subjected towards an atmosphere having very high content of moisture, which of the process is predominant?

Freundlich adsorption isotherms for the physical adsorption of a gas at temperature ${\mathrm{T}}_1, {\mathrm{T}}_2$ and ${\mathrm{T}}_3$ are shown in the graph given below. The correct relationship between ${\mathrm{T}}_1, {\mathrm{T}}_2$ and ${\mathrm{T}}_3$ is

A plot of $\log (\mathrm{x}/\mathrm{m})$ verses $\log \left(\mathrm{P}\right)$ for adsorption of a gas on a solid gives a straight line with a slope of

In an adsorption experiment, a graph between $\log (\mathrm{x}/\mathrm{m})$ versus $\mathrm{logP}$ was found to be linear with a slope of $45°$. The intercept on $\log (\mathrm{x}/\mathrm{m})$ axis was found to be $0.3010$. The amount of gas adsorbed per gram of charcoal under a pressure of $0.5 \mathrm{atm}$ is

Which statements among the following are correct?
(i) Freundlich isotherm fails at high pressure of the gas.
(ii)$\mathrm{\Delta H}<0$ for both physical and chemical adsorption.
(iii) Physical adsorption is non-selective.
(iv) Chemical adsorption is reversible, where as physical adsorption is irreversible.

Match the following.

The correct answer is:

The protective power of a lyophilic colloidal sol is expressed in terms of

During electro-osmosis of $\mathrm{Fe}{\left(\mathrm{OH}\right)}_3$ sol,