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

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Colloidal particles are visible to naked eye.

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Important Questions on Surface Chemistry

EASY

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

Among the following, the false statement is:

MEDIUM

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

Which of the following statements about colloids is false?

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?

EASY

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.

EASY

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

A

4 %

solution of nitrocellulose in a mixture of alcohol and ether is called

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 haemoglobin and the gold sol are examples of

EASY

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

Among the following, the incorrect statement about colloids is:

MEDIUM

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

Given below are two statements: one is labelled as

Assertion $A$ and the other is labelled as Reason $R$ .

Assertion $A$ : Finest gold is red in colour, as the size of the particles increases, it appears purple then blue and finally gold.

Assertion $R$ : The colour of the colloidal solution depends on the wavelength of light scattered by the dispersed particles.

In the light of the above statements, choose the most appropriate answer from the options given below

MEDIUM

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

A cube of edge length

1 cm

is divided into smaller cubes of uniform size of length

1 nm

. Assuming that no voids are present, the ratio of total surface area of all the cubes of

1 nm

edge length to the surface area of the initial cube 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

Bleeding stops by rubbing alum. Why?

MEDIUM

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?

MEDIUM

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,

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

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

Which can adsorb larger volume of hydrogen gas?

EASY

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

Give reason for medicines are more effective in their colloidal form.

EASY

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

Which one of the following statements is FALSE for hydrophilic sols?