The coagulating power of an ion depends on:
 

1. The magnitude of the charge on the ion alone
2. Size of the ion alone
3. Both magnitude and sign of the charge on the ion.
4. The sign of the charge on the ion alone.

Among the following options, the gas that will be more readily adsorbed on the surface of charcoal is:

1. $C{O}_2$             

2. $N{H}_3$               

3. ${\mathrm{Br}}_2$           

4. $N_2$

The process of converting precipitate into collidal solution on adding an electrolyte is called:

(1) Peptisation                             

(2) Dialysis

(3) Electro-osmosis                     

(4) Eelectrophoresis

The stabilization of the dispersed phase in a lyophobic sol is due to

(1) The viscosity of the medium

(2) The surface tension of the medium

(3) Liking for the medium

(4) The formation of an electrical layer between the two phases

A plot of log $\left(\frac{x}{M}\right)$ against log P for the adsorption of a gas on a solid gives a

straight line with slope equal to :

1. $\frac{1}{n}$

2. n

3. log K

4. K

Which of the following process is used in the extractive metallurgy of magnesium?

1. Fused salt electrolysis

2. Self reduction

3. Aqueous solution electrolysis

4. Thermite process.

Emulsifying agent stabilized the emulsion of oil in water by

1.  Forming an interfacial film between suspended particles and the medium

2.  Dissolving the suspended particles into the medium completely

3.  Coagulating the suspended particles from the medium completely

4.  Converting the suspended particles into vapor completely

If $\frac{22}{7}\mathrm{g}$ of charcoal having, active surface area 1000 ${\mathrm{m}}^2/\mathrm{g}$ is used for monolayer absorption of a gas having molecular radius ${10}^{-8}$ cm, then volume of the absorbed gas at STP is [Avogadro's number = $6 \times {10}^{23}$]

1.  11.2 L

2.  22.4 L

3.  7.46 L

4.  3.73 L

Among the following, the surfactant that will form micelles in aqueous solution at the highest molar concentration

1.  ${\mathrm{CH}}_3 - {\left({\mathrm{CH}}_2\right)}_{14} - {{\mathrm{OSO}}_3}^{-} {\mathrm{K}}^{+}$

2.  ${\mathrm{CH}}_3 - {\left({\mathrm{CH}}_2\right)}_{10} - {\mathrm{COO}}^{-} {\mathrm{Na}}^{+}$

3.  ${\mathrm{CH}}_3 - {\left({\mathrm{CH}}_2\right)}_{11} - {{\mathrm{COO}}_3}^{-} {\mathrm{Na}}^{+}$

4.  ${\mathrm{CH}}_3 - {\left({\mathrm{CH}}_2\right)}_{15} - \stackrel{+}{\mathrm{N}}{\mathrm{H}}_3 {\mathrm{Br}}^{\mathrm{e}}$

The decreasing order of coagulating power of an electrolyte to coagulate the ${\mathrm{As}}_2{\mathrm{S}}_3$ sol is

1.  $\mathrm{NaCl} > {\mathrm{Al}}_2{\left({\mathrm{SO}}_4\right)}_3 > {\mathrm{Ba}}_3{\left({\mathrm{PO}}_4\right)}_2$

2.  ${\mathrm{Ba}}_3{\left({\mathrm{PO}}_4\right)}_2 > NaCl > {\mathrm{Al}}_2{\left({\mathrm{SO}}_4\right)}_3$

3.  ${\mathrm{Al}}_2{\left({\mathrm{SO}}_4\right)}_3 > {\mathrm{Ba}}_3{\left({\mathrm{PO}}_4\right)}_2 > NaCl$

4.  $\mathrm{NaCl} >{\mathrm{Ba}}_3{\left({\mathrm{PO}}_4\right)}_2 > {\mathrm{Al}}_2{\left({\mathrm{SO}}_4\right)}_3$