Zeta potential is

Important Questions on Surface Chemistry

MEDIUM

Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions

The correct option among the following is.

MEDIUM

Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions

Among the following, the correct statement is:

MEDIUM

Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions

Which mixture of the solutions will lead to the formation of negatively charged colloidal $\left[\mathrm{A}\mathrm{g}\mathrm{I}\right]{\mathrm{I}}^{-}$ sol?

MEDIUM

Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions

As per Hardy-Schulze formulation, the flocculation values of the following for ferric hydroxide sol are in the order:

MEDIUM

Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions

The coagulating power of electrolytes having ions ${\mathrm{Na}}^{+}$,  ${\mathrm{Al}}^{3+}$ and ${\mathrm{Ba}}^{2+}$ for arsenic sulphide sol increases in the order,

EASY

Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions

Which property of colloids is not dependent on the charge on colloidal particles?

EASY

Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions

Gold numbers of some colloids are Gelatin: $0.005-0.01$, Gum Arabic: $0.15-0.25$, Oleate: $0.04-1.0$, Starch: $15-25$. Which among the following is a better protective colloid?

EASY

Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions

 Gold numbers of protective colloids $\mathrm{A}, \mathrm{B}, \mathrm{C}$ and $\mathrm{D}$ are. $0.50,$$0.01,0.10 \mathrm{and} 0.005$ Respectively. The correct order of their protective powers is
 

EASY

Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions

Which property of colloidal solution is independent of charge on the colloidal particles?

EASY

Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions

The coagulation values in millimoles per litre of the electrolytes used for the coagulation of $\mathrm{A}{\mathrm{s}}_2{\mathrm{S}}_3$ are given below,

$\mathrm{I}.$ $\left(\mathrm{N}\mathrm{a}\mathrm{C}\mathrm{l}\right)=52$

$\mathrm{II}.$ $\left(\mathrm{B}\mathrm{a}\mathrm{C}{\mathrm{l}}_2\right)=0.69$

$\mathrm{III}.$ $\left(\mathrm{M}\mathrm{g}\mathrm{S}{\mathrm{O}}_4\right)=0.22$

The correct order of their coagulating power is

MEDIUM

Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions

In the coagulation of a positive sol, the flocculating power of the ions ${\mathrm{PO}}_4^{3-},{\mathrm{SO}}_4^{2-}$ and ${\mathrm{Cl}}^{-}$ decreases in the order

EASY

Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions

For coagulation of arsenious sulphide sol, which of the following salt solutions will be most effective?

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Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions

Tyndall effect is observed when :

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Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions

Among the following, the incorrect statement about colloids is:

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Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions

Measuring Zeta potential is useful in determining which property of colloidal solution?

HARD

Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions

A sol of $\mathrm{Agl}$ is prepared by mixing equal volumes of $0.1 \mathrm{M} {\mathrm{AgNO}}_3$ and $0.2 \mathrm{M} \mathrm{Kl}$, which of the following statement is correct?

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Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions

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

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Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions

The Tyndall effect is observed only when the following conditions are satisfied,

$\left(\mathrm{i}\right)$ The diameter of the dispersed particles is much smaller than the wavelength of the light used.

$\left(\mathrm{ii}\right)$ The diameter of the dispersed particle is not much smaller than the wavelength of the light used.

$\left(\mathrm{iii}\right)$ The refractive indices of the dispersed phase and dispersion medium are almost similar in magnitude.

$\left(\mathrm{iv}\right)$ The refractive indices of the dispersed phase and dispersion medium differ greatly in magnitude.

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Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions

Among the following, the false statement is:

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Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions

The haemoglobin and the gold sol are examples of