Embibe Experts Solutions for Chapter: Surface Chemistry, Exercise 1: AP EAPCET - 3 Sep 2021 Afternoon

Which one of the following is correct regarding physisorption?

Predict which of the following gases show least adsorption on a definite amount of charcoal? ${\mathrm{T}}_{\mathrm{c}}$ (Critical temperature) of gases in $\mathrm{K}$ scale is as

${\mathrm{CO}}_2\left({\mathrm{T}}_{\mathrm{c}}-304\mathrm{K}\right)$
${\mathrm{NH}}_3\left({\mathrm{T}}_{\mathrm{c}}-406\mathrm{K}\right)$
${\mathrm{SO}}_2\left({\mathrm{T}}_{\mathrm{c}}-430\mathrm{K}\right)$
$\mathrm{HCl}\left({\mathrm{T}}_{\mathrm{c}}-324\mathrm{K}\right)$

Which of the following Absorption-Temperature graphs represent the variation of physical adsorption with temperature?

In Freundlich adsorption isotherm the value of $\frac{1}{\mathrm{n}}$ is _________

The role of a catalyst in a reversible reaction is

Which among the following sols are hydrophobic sols?

(i) Protein
(ii) Gold
(iii) Gum
(iv) $\mathrm{Fe}(\mathrm{OH}{)}_3$

Using Bredig's arc method, which of the following metallic sols cannot be prepared _______

Identify the correct statements from the following
I) Protective power of a lyophobic colloid is expressed by gold number
II) Haemoglobin is a positively charged sol
III) Metal sols are prepared by peptization process
IV) Colloidal solution and true solution can be distinguished by Tyndall effect