Question:
In physical adsorption, the gas molecules are held by solid surfaces through:
In physical adsorption, the gas molecules are held by solid surfaces through:
Show Hint
In physical adsorption, van der waalsâ forces, which are weak interactions, hold gas molecules to the surface.
Updated On: Apr 22, 2026
- Strong chemical forces
- Van der waalsâ forces
- Metallic bonds
- Gravitational forces
Show Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Identifying the types of forces in adsorption.
In physical adsorption, the gas molecules are held by weak forces, mainly van der waals' forces, which are temporary dipole interactions between molecules.
Step 2: Explanation of the options.
- (1) Strong chemical forces: Chemical forces are involved in chemisorption, not in physical adsorption.
- (2) Van der waalsâ forces: This is the correct option. In physical adsorption, van der waalsâ forces are responsible for holding the gas molecules to the surface.
- (3) Metallic bonds: Metallic bonds are not involved in adsorption.
- (4) Gravitational forces: Gravitational forces are too weak to play a significant role in adsorption.
Step 3: Conclusion.
The correct answer is (2) Van der waalsâ forces.
In physical adsorption, the gas molecules are held by weak forces, mainly van der waals' forces, which are temporary dipole interactions between molecules.
Step 2: Explanation of the options.
- (1) Strong chemical forces: Chemical forces are involved in chemisorption, not in physical adsorption.
- (2) Van der waalsâ forces: This is the correct option. In physical adsorption, van der waalsâ forces are responsible for holding the gas molecules to the surface.
- (3) Metallic bonds: Metallic bonds are not involved in adsorption.
- (4) Gravitational forces: Gravitational forces are too weak to play a significant role in adsorption.
Step 3: Conclusion.
The correct answer is (2) Van der waalsâ forces.
Was this answer helpful?
0
0
Top MET Chemistry Questions
- Which of the following product is formed in the reaction $ CH_3MgBr {->[(i)CO_2][(ii)H_2O]} ? $
- Ethyl chloride is converted into diethyl ether by:
- Correct order of reactivity:
- A group of 13 element if added in small amounts to Ge, then the type of semiconductor formed is
- Consider the following statements I. Repulsive forces are significant when the molecules are close together on average. II. Attractive intermolecular forces are important when the molecules are fairly close together but not necessarily touching. III. Attractive forces are ineffective when the molecules are for apart. Select correct statements.
View More Questions
Top MET Surface Chemistry Questions
- A certain amount of a metal whose equivalent mass is 28 displaces $0.7 \mathrm{L}$ of $\mathrm{H}_2$ at STP from an acid. Hence, mass of the element is
- Coordination number of Zn in ZnS is
- Lyophilic sols are more stable than lyophobic sols because
- Deviation from the ideal gas behaviour of a gas can be expressed as
- If ionic radius of \( Cs^+ \) and \( Cl^- \) are 1.69 Å and 1.81 Å respectively, the edge length of unit cell is
View More Questions
Top MET Questions
- A coil of 100 turns and area $2 \times 10^{-2}m^2 $ is pivoted about a vertical diameter in a uniform magnetic field and carries a current of 5A. When the coil is held with its plane in north-south direction, it experiences a couple of 0.33 Nm. When the plane is east-west, the corresponding couple is 0.4 Nm, the value of magnetic induction is [Neglect earth's magnetic field]
- $\int\limits_{0}^{8}| x -5| d x$ is equal to
- Radiation, with wavelength 6561 $?$ falls on a metal surface to produce photoelectrons. The electrons are made to enter a uniform magnetic field of $3 \times 10^{-4} T$. If the radius of the largest circular path followed by the electrons is 10 mm, the work function of the metal is close to :
- In intrinsic semiconductor at room temperature number of electrons and holes are
- Which of the following product is formed in the reaction $ CH_3MgBr {->[(i)CO_2][(ii)H_2O]} ? $
View More Questions