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

• 
• 
• 

• All of the above are correct for a different range of pressure

D.

All of the above are correct for a different range of pressure

For a linear plot of log (x/m) versus log p in a Freundlich adsorption isotherm, which of the following statements is correct? (k and n are constants)

• 1/n appears as the intercept.

• Only 1/n appears as the slope.

• log (1/n) appears as the intercept.

• Both k and 1/n appear in the slope term

Gold numbers of protective colloids A, B, C and D are 0.50, 0.01, 0.10 and 0.005, respectively. The correct order of their protective powers is

•  D < A < C < B

• C < B < D < A

•  A < C < B < D

• B < D < A < C 

The coagulating power of electrolytes having ions Na⁺, Al³⁺ and Ba²⁺ for arsenic sulphide sol increases in the order:

• Al³⁺<Ba²⁺<Na⁺

• Na⁺<Ba²⁺<Al³⁺

• Ba²⁺< Na²⁺<Al³⁺

• Al³⁺< Na⁺<Ba²⁺

The disperse phase in colloidal iron (III) hydroxide and colloidal gold is positively and negatively charged, respectively, which of the following statements is NOT correct?

• magnesium chloride solution coagulates, the gold sol more readily than the iron (III) hydroxide sol.

• sodium sulphate solution causes coagulation in both sols

• mixing the sols has no effect

• coagulation in both sols can be brought about by electrophoresis