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The coagulation value in millimoles per litre of electrolytes used for the coagulation of $A s_{2} S_{3}$ are as below
$I .$ NaCl = 52
$I I .$ KCl = 51
$I I I .$ $B a C l_{2} = 0.69$
$I V .$ $M g S O_{4} = 0.22$
The correct order of their flocculating power is

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Important Questions on Adsorption and Colloids

MEDIUM

Chemistry>Physical Chemistry>Adsorption and Colloids>Colloids

The correct option among the following is.

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Chemistry>Physical Chemistry>Adsorption and Colloids>Colloids

Among the following, the correct statement is:

MEDIUM

Chemistry>Physical Chemistry>Adsorption and Colloids>Colloids

Which mixture of the solutions will lead to the formation of negatively charged colloidal

[A g I] I^{-}

sol?

MEDIUM

Chemistry>Physical Chemistry>Adsorption and Colloids>Colloids

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

MEDIUM

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The coagulating power of electrolytes having ions

{Na}^{+}

{Al}^{3 +}

and

{Ba}^{2 +}

for arsenic sulphide sol increases in the order,

EASY

Chemistry>Physical Chemistry>Adsorption and Colloids>Colloids

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

EASY

Chemistry>Physical Chemistry>Adsorption and Colloids>Colloids

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>Adsorption and Colloids>Colloids

Gold numbers of protective colloids

A, B, C

and

D

are.

0.50,

0.01, 0.10 and 0.005

Respectively. The correct order of their protective powers is

EASY

Chemistry>Physical Chemistry>Adsorption and Colloids>Colloids

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

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Chemistry>Physical Chemistry>Adsorption and Colloids>Colloids

The coagulation values in millimoles per litre of the electrolytes used for the coagulation of

A s_{2} S_{3}

are given below,

I .

(N a C l) = 52

II .

(B a C l_{2}) = 0.69

III .

(M g S O_{4}) = 0.22

The correct order of their coagulating power is

MEDIUM

Chemistry>Physical Chemistry>Adsorption and Colloids>Colloids

In the coagulation of a positive sol, the flocculating power of the ions

{PO}_{4}^{3 -}, {SO}_{4}^{2 -}

and

{Cl}^{-}

decreases in the order

EASY

Chemistry>Physical Chemistry>Adsorption and Colloids>Colloids

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

EASY

Chemistry>Physical Chemistry>Adsorption and Colloids>Colloids

Tyndall effect is observed when :

EASY

Chemistry>Physical Chemistry>Adsorption and Colloids>Colloids

Among the following, the incorrect statement about colloids is:

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Chemistry>Physical Chemistry>Adsorption and Colloids>Colloids

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

HARD

Chemistry>Physical Chemistry>Adsorption and Colloids>Colloids

A sol of

Agl

is prepared by mixing equal volumes of

0.1 M {AgNO}_{3}

and

0.2 M Kl

, which of the following statement is correct?

EASY

Chemistry>Physical Chemistry>Adsorption and Colloids>Colloids

During electro-osmosis of

Fe {(OH)}_{3}

sol,

EASY

Chemistry>Physical Chemistry>Adsorption and Colloids>Colloids

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

(i)

The diameter of the dispersed particles is much smaller than the wavelength of the light used.

(ii)

The diameter of the dispersed particle is not much smaller than the wavelength of the light used.

(iii)

The refractive indices of the dispersed phase and dispersion medium are almost similar in magnitude.

(iv)

The refractive indices of the dispersed phase and dispersion medium differ greatly in magnitude.

EASY

Chemistry>Physical Chemistry>Adsorption and Colloids>Colloids

Among the following, the false statement is:

EASY

Chemistry>Physical Chemistry>Adsorption and Colloids>Colloids

The haemoglobin and the gold sol are examples of

The coagulation value in millimoles per litre of electrolytes used for the coagulation of As2S3 are as below I. NaCl = 52 II. KCl = 51 III. BaCl2=0.69 IV. MgSO4=0.22 The correct order of their flocculating power is

Important Questions on Adsorption and Colloids

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The coagulation value in millimoles per litre of electrolytes used for the coagulation of $A s_{2} S_{3}$ are as below
$I .$ NaCl = 52
$I I .$ KCl = 51
$I I I .$ $B a C l_{2} = 0.69$
$I V .$ $M g S O_{4} = 0.22$
The correct order of their flocculating power is