Match the following: List- I List- II Type of Colloid Phase in medium ( A ) Aerosol ( I ) Solid in solid ( B ) Emulsion ( II ) Liquid in solid ( C ) Foam ( III ) Gas in liquid ( D ) Gel ( IV ) Solid in gas ( V ) Liquid in liquid The correct answer is

A = IV , B = V , C = III , D = II

A = I , B = II , C = III , D = IV

A = IV , B = V , C = II , D = III

A = II , B = V , C = I , D = IV

Match the following: (i) Foam (a) smoke (ii) Gel (b) cell fluid (iii) Aerosol (c) jellies (iv) Emulsion (d) rubber (e) froth (f) milk

(i) – (e), (ii) – (c), (iii) – (a), (iv) – (f)

(i) – (b), (ii) – (c), (iii) – (e), (iv) – (d)

(i) – (d), (ii) – (b), (iii) – (a), (iv) – (e)

(i) – (d), (ii) – (b), (iii) – (e), (iv) – (f)

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For an ionic micelle-forming surfactant near its critical micelle concentration (CMC), the dependence of molar conductivity and surface tension on surfactant concentration is best represented by,

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Important Questions on Surface Chemistry

EASY

Chemistry>Physical Chemistry>Surface Chemistry>Classification of Colloids

Kraft temperature is the temperature:

MEDIUM

Chemistry>Physical Chemistry>Surface Chemistry>Classification of Colloids

An ionic micelle is formed on the addition of:

EASY

Chemistry>Physical Chemistry>Surface Chemistry>Classification of Colloids

A sample of red ink (a colloidal suspension) is prepared by mixing eosine dye, egg white,

HCHO

and water. The component which ensures stability of the ink sample is :

EASY

Chemistry>Physical Chemistry>Surface Chemistry>Classification of Colloids

Match the following:

	List- $I$		List- $II$
	Type of Colloid		Phase in medium
( $A$ )	Aerosol	( $I$ )	Solid in solid
( $B$ )	Emulsion	( $II$ )	Liquid in solid
( $C$ )	Foam	( $III$ )	Gas in liquid
( $D$ )	Gel	( $IV$ )	Solid in gas
		( $V$ )	Liquid in liquid

The correct answer is

EASY

Chemistry>Physical Chemistry>Surface Chemistry>Classification of Colloids

Fog is a colloidal solution of:

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Chemistry>Physical Chemistry>Surface Chemistry>Classification of Colloids

The mass of Haemoglobin in

mg

required to protect from coagulation of

50 mL

of a gold sol on adding

5 mL

10 % NaCl

solution is: (gold number of Haemoglobin

= 0.03

)

MEDIUM

Chemistry>Physical Chemistry>Surface Chemistry>Classification of Colloids

Identify the correct molecular picture showing what happens at the critical micellar concentration $(CMC)$ of an aqueous solution of a surfactant

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EASY

Chemistry>Physical Chemistry>Surface Chemistry>Classification of Colloids

Sulphur sol is an example of

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Chemistry>Physical Chemistry>Surface Chemistry>Classification of Colloids

Molar conductivity

(⋀_{m})

of aqueous solution of sodium stearate, which behaves as a strong electrolyte, is recorded at varying concentration(c) of sodium stearate. Which one of the following plots provides the correct representation of micelle formation in the solution?

(Critical micelle concentration (CMC) is marked with an arrow in the figures.)

EASY

Chemistry>Physical Chemistry>Surface Chemistry>Classification of Colloids

Critical Micelle concentration for a soap solution is