Which of the following gases adsorb more

Options

A. `H_(2)`
B. `N_(2)`
C. `O_(2)`
D. `NH_(3)`

Answer

To determine which gas among H2, N2, O2, and NH3 is adsorbed the most, we need to consider the intermolecular forces and the ability of these gases to be liquefied. Here’s a step-by-step solution:

### Step 1: Understand Adsorption
Adsorption is the process by which atoms, ions, or molecules from a gas, liquid, or dissolved solid adhere to a surface. The extent of adsorption depends on the intermolecular forces between the adsorbate (the substance being adsorbed) and the adsorbent (the surface).

### Step 2: Identify the Gases
The gases given are:
- H2 (Hydrogen)
- N2 (Nitrogen)
- O2 (Oxygen)
- NH3 (Ammonia)

### Step 3: Analyze Intermolecular Forces
- **H2**: This is a non-polar molecule and primarily exhibits London dispersion forces (Van der Waals forces).
- **N2**: Like H2, nitrogen is also a non-polar molecule and has similar London dispersion forces.
- **O2**: Oxygen is also non-polar and exhibits London dispersion forces.
- **NH3**: Ammonia is a polar molecule and exhibits stronger intermolecular forces due to hydrogen bonding.

### Step 4: Compare Liquefaction Tendencies
Liquefaction of gases is influenced by the strength of intermolecular forces:
- Gases that are easily liquefied have stronger intermolecular forces.
- Among the gases listed, NH3 has the strongest intermolecular forces due to hydrogen bonding, making it the most easily liquefied gas.

### Step 5: Conclusion
Since NH3 has the strongest intermolecular forces, it will also be the gas that is adsorbed the most. Therefore, the answer is:
**D) NH3**