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Gold sol is negatively charged. The flocculation values of effective ions vary in the order :

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Important Questions on Surface Chemistry

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

The haemoglobin and the gold sol are examples of

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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?

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

The correct option among the following is.

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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:

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

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

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

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

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

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

[A g I] I^{-}

sol?

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

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>Surface Chemistry>Properties of Colloidal Solutions

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

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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,

(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.

MEDIUM

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

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

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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

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

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?

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

During electro-osmosis of

Fe {(OH)}_{3}

sol,

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

Among the following, the correct statement is:

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

The coagulating power of electrolytes having ions

{Na}^{+}

{Al}^{3 +}

and

{Ba}^{2 +}

for arsenic sulphide sol increases in the order,

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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?

Gold sol is negatively charged. The flocculation values of effective ions vary in the order :

Important Questions on Surface Chemistry

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