Question

Identify the gas adsorbed by solid to the largest extent at their respective critical temperature.

• A. \(\text{N}_{2(g)}\)
• B. \(\text{O}_{2(g)}\)
• C. \(\text{H}_{2(g)}\)
• D. \(\text{SO}_{2(g)}\)

Hint:

Gases with higher critical temperature are more easily liquefied, so they are adsorbed more.

Answer 1

The Correct Option is D

Step 1: Relate adsorption to liquefaction:
Physical adsorption uses the same weak attractive forces that cause a gas to condense, so easily condensed gases stick better to a solid.

Step 2: Rank by ease of liquefaction:
$\text{SO}_2$ liquefies at about -10 degrees C under 1 atm, while $\text{N}_2$, $\text{O}_2$ and $\text{H}_2$ need extreme cooling.

Step 3: Pick:
$\text{SO}_2$ is adsorbed to the largest extent, option D.

Final Answer:
The most easily liquefied gas, SO2, is adsorbed the most. \[ \boxed{\text{(D) }\text{SO}_{2(g)}} \]