Question

Which can adsorb larger volume of hydrogen gas ?

• A. finely divided platinum
• B. Finely divided nickel
• C. Colloidal Fe(OH)₃
• D. Colloidal solution of Palladium

Answer 1

The Correct Option is D

The adsorption of hydrogen gas by a substance depends on its surface area and the nature of the surface. Finely divided and colloidal substances generally have larger surface areas compared to their bulk counterparts, making them more effective at adsorbing gases.
Palladium is known for its high hydrogen adsorption capacity, and a colloidal solution of Palladium has a large surface area due to the fine particle size.
Therefore, a colloidal solution of Palladium is expected to adsorb a larger volume of hydrogen gas compared to the other options.
Finely divided platinum (option A) and finely divided nickel (option B) can also adsorb hydrogen gas to some extent due to their high surface areas. However, Palladium has a higher affinity for hydrogen adsorption.
Colloidal Fe(OH)₃ (option C) is not known for its significant hydrogen adsorption capabilities. It may have some adsorption capacity, but it is not as efficient as Palladium.
Therefore, option (D) Colloidal solution of Palladium is the most likely to adsorb a larger volume of hydrogen gas.

Answer 2

Correct answer: Colloidal solution of Palladium 

Palladium has an exceptional ability to adsorb large volumes of hydrogen gas, even several hundred times its own volume. It does this through chemisorption where hydrogen molecules are dissociated and absorbed into the metal lattice.

Therefore, among the given options, colloidal palladium is most effective in adsorbing hydrogen gas.

Answer 3

Colloidal solution of Palladium can adsorb the largest volume of hydrogen gas among the given options.

Explanation:

• Adsorption is a surface phenomenon where gas molecules adhere to the surface of a solid or liquid.
• Transition metals, particularly platinum and palladium, are known for their excellent ability to adsorb hydrogen gas. This is due to their electronic structure and their ability to form strong interactions with hydrogen molecules.
• Platinum is generally considered to be a better adsorbent for hydrogen than nickel.
• Palladium is also a good adsorbent, but the question specifies a "colloidal solution" of palladium. Colloidal solutions have a lower surface area compared to finely divided solid platinum. This limits the amount of hydrogen that can be adsorbed.
• Colloidal Fe(OH)₃ is not particularly effective at adsorbing hydrogen gas compared to platinum or palladium.

Therefore, the correct answer is:

Colloidal solution of Palladium