According to Freundlich adsorption isotherm, which of the following is correct:-

(1) $\frac{\mathrm{x}}{\mathrm{m}}\mathrm{\alpha }<mspace\; width="1em"></mspace>\mathrm{p}°$

(2) $\frac{\mathrm{x}}{\mathrm{m}}\mathrm{\alpha }<mspace\; width="1em"></mspace>\mathrm{p}$

(3) $\frac{\mathrm{x}}{\mathrm{m}}\mathrm{\alpha }<mspace\; width="1em"></mspace>{\mathrm{p}}^{1/\mathrm{n}}$

(4) All are correct for different ranges of pressure

The most suitable electrolyte for the coagulation of arsenic sulphide will be:-

1. AlCl₃

2. BaCl₂

3. NaCl

4. KCl

The charge on As₂S₃ sol is due to to the adsorbed:-

(1) H⁺

(2) OH^-

(3) O^-2

(4) S^-2

Which one has the highest coagulation power?

1. K⁺

2. Ca⁺⁺

3. Al⁺⁺⁺

4. Sn⁴⁺

At the critical micelle concentration (CMC) the surfactant molecule

1. deccompose

2. dissociate

3. associate

4. become completely soluble

As₂S₃ sol is

1. possible colloid                 
2. negative colloid
3. neutral colloid                 
4. none of the above

Which of the following is not applicable to chemisorption?

1. Its heat of adsorption is high

2. It takes place at high temperature

3. It is reversible

4. It forms unimolecular layer

The decomposition of H₂O₂ may be checked by adding a small quantity of phosphoric acid. This is an example of:

(1) neutralization           

(2) negative catalysis

(3) positive catalysis       

(4) catalytic poisoning

Which one of the following statements is not correct?
(1) Catalyst does not initiate any reaction

(2) The value of equilibrium constant is changed in the presence of a catalyst in the reaction equilibrium

(3) Enzymes catalyse mainly biochemical reaction

(4) Coenzymes increase the catalytic activity of enzyme

The coagulation values in millimoles per liter of the electrolytes used for the coagulation of As₂S₃ are given below

I. (NaCl) =52               II. (BaCl₂) =0.69

III. (MgSO₄) = 0.22

The correct order of their coagulating power is

(1) I>II>III                 

(2) II>I>III

(3) III>II>I                 

(4) III>I>II