
Which force is responsible for the gas to be held on the surface in Physical adsorption
A. Chemical forces
B. Electrostatic forces
C. Gravitational forces
D. Van Der Waals forces
Answer
163.8k+ views
Hint: Physical adsorption is a simple approach, which attaches the target substance to a chip as a result of hydrogen bonding, van der Waals forces, and hydrophobic interactions. It is also known as Physisorption. In physical adsorption, there are weak van der Waals forces. Therefore, it forms multilayers.
Complete Step by Step Solution:
Physisorption is caused by the intermolecular force that exists between adsorbates and adsorbents. The adsorption is known as van der Waals adsorption since it is caused by the force called van der Waals force. Since van der Waals force exists between adsorbent and adsorbate, physical adsorption can occur on any solid surface.
In chemisorption, adsorbate is attached by a chemical bond. In physical adsorption, the bonding between adsorbent and adsorbate is weak in van der Waal. s bonding which is due to electrostatic forces of attraction between opposite charges. As such multimolecular layers are possible.
Hence the correct option is D.
Note: Physical adsorption phenomenon involves the use of weak Van der Waal forces by means of which gas molecules get adsorbed on a solid surface. It is not specific in nature and hence any gas can be adsorbed onto the surface. Example: Physisorption is the adsorption of gases like hydrogen, nitrogen, etc at lower temperatures on the surface of adsorbent like charcoal.
Complete Step by Step Solution:
Physisorption is caused by the intermolecular force that exists between adsorbates and adsorbents. The adsorption is known as van der Waals adsorption since it is caused by the force called van der Waals force. Since van der Waals force exists between adsorbent and adsorbate, physical adsorption can occur on any solid surface.
In chemisorption, adsorbate is attached by a chemical bond. In physical adsorption, the bonding between adsorbent and adsorbate is weak in van der Waal. s bonding which is due to electrostatic forces of attraction between opposite charges. As such multimolecular layers are possible.
Hence the correct option is D.
Note: Physical adsorption phenomenon involves the use of weak Van der Waal forces by means of which gas molecules get adsorbed on a solid surface. It is not specific in nature and hence any gas can be adsorbed onto the surface. Example: Physisorption is the adsorption of gases like hydrogen, nitrogen, etc at lower temperatures on the surface of adsorbent like charcoal.
Recently Updated Pages
JEE Main 2021 July 25 Shift 1 Question Paper with Answer Key

JEE Main 2021 July 22 Shift 2 Question Paper with Answer Key

JEE Atomic Structure and Chemical Bonding important Concepts and Tips

JEE Amino Acids and Peptides Important Concepts and Tips for Exam Preparation

JEE Electricity and Magnetism Important Concepts and Tips for Exam Preparation

Chemical Properties of Hydrogen - Important Concepts for JEE Exam Preparation

Trending doubts
JEE Main 2025 Session 2: Application Form (Out), Exam Dates (Released), Eligibility, & More

Atomic Structure - Electrons, Protons, Neutrons and Atomic Models

JEE Main 2025: Derivation of Equation of Trajectory in Physics

Displacement-Time Graph and Velocity-Time Graph for JEE

Types of Solutions

Electric Field Due to Uniformly Charged Ring for JEE Main 2025 - Formula and Derivation

Other Pages
JEE Advanced Marks vs Ranks 2025: Understanding Category-wise Qualifying Marks and Previous Year Cut-offs

NCERT Solutions for Class 11 Chemistry In Hindi Chapter 1 Some Basic Concepts of Chemistry

JEE Advanced Weightage 2025 Chapter-Wise for Physics, Maths and Chemistry

Degree of Dissociation and Its Formula With Solved Example for JEE

NCERT Solutions for Class 11 Chemistry Chapter 7 Redox Reaction

Instantaneous Velocity - Formula based Examples for JEE
