Question

Which one of the following statements is correct :

i) Brownian movement is more pronounced for smaller particles than for bigger ones

ii) Sols of metal sulphides are lyophilic

iii) Schulze-Hardey law states, the bigger the size of the ion, the greater is its coagulating power

iv) One would be expect charcoal to adsorb chlorine more strongly hydrogen sulphide

• A. i , iii
• B. i, iii & iv
• C. ii, iv
• D. i, iii

Answer 1

The correct option is A i , iii

Metal sulphides are lyophobic sols

HCl is polar $C{l}_2$ is non polar