Two statements are given below
Statements I : Adsorption of a gas on the surface of charcoal is primarily an exothermic reaction.
Statement II : A closed vessel contains $\mathrm{O}_2, \mathrm{H}_2, \mathrm{Cl}_2$, $\mathrm{NH}_3$ gases. Its pressure is $p$ (atm). About 1 g of charcoal is added to this vessel and after some time its pressure was found to be less than $p$ (atm)
The correct answer is
' $A$ ' is a protecting colloid. The following data is obtained for preventing the coagulation of 10 mL of gold sol to which 1 mL of $10 \% \mathrm{NaCl}$ is added. What is the gold number of ' $A$ '?
| Expt. No. | Wt (in mg ) of $\boldsymbol{A}$ added to gold sol | $$ \text { Coagulation } $$ |
|---|---|---|
| 1 | 40 | Prevented |
| 2 | 35 | Prevented |
| 3 | 25 | Not prevented |
| 4 | 32 | Not prevented |
| 5 | 33 | Prevented |
| Conc. of $\mathrm{Cl}^{-}$in $\mathrm{mol} \mathrm{L}^{-1}$ |
Result |
|---|---|
| $$ 5 \times 10^{-5} $$ |
Sol not precipitated |
| $$ 6 \times 10^{-5} $$ |
Sol not precipitated |
| $$ 7 \times 10^{-5} $$ |
Sol precipitated |
| $$ 8 \times 10^{-5} $$ |
Sol precipitated |
| $$ 1 \times 10^{-4} $$ |
Sol precipitated |
$$ \text { Match List - I, with List-II. } $$
$$ \begin{array}{llll} \hline & \text { List I } & & \text { List II } \\ \hline \text { I } & \text { Colloidal antimony } & \text { A } & \text { Kalaazar } \\ \hline \text { II } & \text { Silver sol } & \text { B } & \text { Intermuscular injection } \\ \hline \text { III } & \text { Milk of magnesia } & \text { C } & \text { Eye lotion } \\ \hline \text { IV } & \text { Gold sol } & \text { D } & \text { Stomach disorder } \\ \hline \end{array} $$
| List I | List II |
| A. Aerosol | I. Milk |
| B. Foam | II. Soap lather |
| C. Emulsion | III. Cheese |
| D. Gel | IV. Smoke |
' $X$ ' is a protecting colloid. The following data is obtained for preventing the coagulation of 10 mL of gold sol to which 1 mL of $10 \% \mathrm{NaCl}$ is added. What is the gold number of ' $X$ '?
$$ \begin{array}{ccl} \hline \text { Expt No. } & \begin{array}{c} \text { Weight of } X \text { (in mg) } \\ \text { added to gold sol } \end{array} & \text { Coagulation } \\ \hline 1 & 24 & \text { Not prevented } \\ \hline 2 & 23 & \text { Not prevented } \\ \hline 3 & 26 & \text { Prevented } \\ \hline 4 & 27 & \text { Prevented } \\ \hline 5 & 25 & \text { Prevented } \\ \hline \end{array} $$
Given below are two statements.
Statements I Easily liqueflable gases are readily adsorbed.
Statements II Adsorption enthalpy for physisorption is less compared to adsorption enthalpy for chemisorption.
The correct answer is
The correct order of coagulating power of the following ions to coagulate the positive sol is
$$\mathrm{\mathop {{{[Fe{{(CN)}_6}]}^{4 - }}}\limits_I ,\mathop {C{l^ - }}\limits_{II} ,\mathop {SO_4^{2 - }}\limits_{III}}$$
The macromolecular colloids of the following are
I. Starch solution
II. Sulphur sol
III. Synthetic detergent
IV. Synthetic rubber
Assertion (A) Animal skins are colloidal in nature.
Reason (R) Animal skin has positively charged particles.
The diameters range of colloidal particles is approximately.
In an adsorption experiment, a graph between $$\log (x / m)$$ versus $$\log p$$ was found to be linear with a slope of $$45^{\circ}$$. The intercept on $$\log (x / m)$$ 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
Among the following, in which type of chromatography, both stationary and mobile phases are in liquid state?
The protective power of a lyophilic colloidal sol is expressed in terms of
A plot of $$\log (x / m)$$ versus $$\log (p)$$ for adsorption of a gas on a solid gives a straight line with a slope of