Match the following:

List - I	List - II
A. Solid dispersed in liquid	i. Emulsion
B. Liquid dispersed in liquid	ii. Foam
C. Gas dispersed in liquid	iii. Gel
D. Liquid dispersed in solid	iv. Sol v. Aerosol

The correct match is

• A - iv; B - i; C - ii; D - iii

• A - iii; B - i; C - v; D - ii

• A - iii; B - i; C - ii; D - iv

• A - iv; B - i; C - v; D - iii

Gelly is a colloidal solution of

• solid in liquid

• liquid in solid

• liquid in liquid

• solid in solid

Which of the following is the most effective in causing coagulation of ferric hydroxide solution?

• KCl

• KNO₃

• K₂SO₄

• K₃[Fe(CN)₆]

Which of the following statements is not correct inrespect of chemisorption?

• Highly specific adsorption

• Irreversible adsorption

• Multilayered adsorption

• High enthalpy of adsorption

Colloidal solution of gold is in different colours like red, purple, blue and golden because of

• variable oxidation states of gold

• size difference in the particles of gold

• presence of impurities

• difference in the concentration of gold particles

The size of colloidal particles is in between

• 10^-7 - 10^-9 cm

• 10^-9 - 10^-11 cm

• 10^-5 - 10^-7 cm

• 10^-2 - 10^-3 cm

The stability of lyophilic colloids is due to which of the following?

• Charge on their particles

• Large size of their particles

• Smaller size of their particles

• A layer of medium of dispersion on their particles

Milk is

• fat dispersed in water

• water dispersed in fat

• water dispersed in oil

• fat dispersed in fat

In chemical adsorption, how many layers are adsorbed?

• One

• Two

• Multi

• Zero

What is the role of a catalyst in a catalysed reaction?

• Lowers the activation energy

• Increases the activation energy

• Affects the free energy change

• Affects the enthalpy change