Fog is a colloidal solution of:-

1. Gas in liquid

2. Solid in gas

3. Gas in gas

4. Liquid in gas

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

1. Coagulation           

2. Electrophoresis

3. Electroosmosis       

4. Tyndall effect

In Freundlich adsorption isotherm, the value of 1/n is

1. between 0 and 1 in all cases

2. between 2 and 4 in all cases

3. 1 in case of physical adsorption

4. 1 in case of chemisorption

Which one of the following statements is incorrect about enzyme catalysis?

1. Enzymes are mostly proteinous in nature

2. Enzyme action is specific

3. Enzymes are denaturated by ultraviolet rays and at high temperature

4. Enzymes are least reactive at optimum temperature

The protecting power of lyophilic colloidal sol is expressed in terms of 

1. coagulation value

2. gold number

3. critical micelle concentration

4. oxidation number

If x is amount of adsorbate and m is amount of adsorbent,which of the following relations

is not named to adsorption process?

1. x/m=f(t) at constant p
2. p=f(t) at constant (x/m)
3. x/m=p x T
4. x/m=f(p) at constant T

The Langmuir adsorption isotherm is deduced using the assumption:
(1) The adsorption takes place in multilayers

(2) The adsorption sites are equivalent in their ability to adsorb the particles

(3) The heat of adsorption varies with  coverage

(4) The adsorbed molecules interact with each other

A plot of log x/m verses log p for the adsorption of a gas on a solid gives a straight line with slope equal to:-

(1) -log k

(2) n

(3) 1/n

(4) log k

Which one of the following characteristics is associated with adsorption?

(1) $∆$G, $∆$H and $∆$S all are negative

(2) $∆$G and $∆$H are negative but $∆$S is positive

(3) $∆$G and $∆$S are negative but $∆$H is positive

(4) $∆$G is negative but $∆$H and $∆$S are positive

The addition of a catalyst during a chemical reaction alters which of the following quantities?

(1) Internal energy

(2) Enthalpy

(3) Activation energy

(4) Entropy