Question

Which can adsorb a larger volume of hydrogen gas ?

• A. Colloidal solution of palladium
• B. Finely divided nickel
• C. Finely divided platinum
• D. Colloidal $Fe(OH{)}_3$

Answer 1

The correct option is A Colloidal solution of palladium

True solutions are homogeneous system and suspensions are heterogeneous. These are two extreme systems and the colloidal state is an intermediate between the two.

The colloidal state is heterogeneous dispersion of solute particles of size ranging between $10\dot{A}$ to ${10}^3\dot{A}$ into a solvent. Colloid has a large surface area for a given volume.

Colloidal solution of $palladium$ can adsorb the largest volume of hydrogen gas because palladium has largest surface area in its colloidal solution than $platinum$ and $Fe(OH{)}_2$ and adsorption increases with increase in surface area.

Therefore Colloidal solution of palladium can adsorb a larger volume of $H_2$ gas.

Hence the correct option is (A).