
Explain the phenomenon of capillarity?
Answer
504.9k+ views
Hint: Capillarity is a phenomenon by which the liquid moves without the help of gravity. The liquid level rises to some height against the gravitational force, through the narrow tube. This action is due to the phenomenon of surface tension of the liquid.
Complete step by step solution
The capillarity action is due to the surface tension and adhesive force between the liquid molecule and the molecule of the tube. Surface tension of the liquid is due to the cohesive attraction of the liquid molecules.
When a thin tube which is open or closed top is inserted into the container having liquid, then the liquid inside the tube gets rising to some height above the liquid in the container. Then the diameter of the tube is . The density of the liquid is . Then,
Where, is the weight of the liquid, is the acceleration due to gravity.
When the glass tube is dipped into the container having the liquid of angle of contact which is less than then the liquid rises up in the tube till the equilibrium condition is attended. And here the adhesive forces are greater than cohesive force. Example: Water.
When the glass tube is dipped into the container having the liquid of angle of contact which is greater than then the liquid gets fall off in the tube till the equilibrium condition is attended. And here the cohesive forces are greater than adhesive force. Example: Mercury.
Note: Capillarity is the ability of a liquid which flows in narrow spaces without any assistance and acts against gravity. It occurs because of the intermolecular forces between the liquid and the molecules of the narrow tube which is inserted in the container of the liquid.
Complete step by step solution
The capillarity action is due to the surface tension and adhesive force between the liquid molecule and the molecule of the tube. Surface tension of the liquid is due to the cohesive attraction of the liquid molecules.
When a thin tube which is open or closed top is inserted into the container having liquid, then the liquid inside the tube gets rising to some height
Where,
When the glass tube is dipped into the container having the liquid of angle of contact which is less than
When the glass tube is dipped into the container having the liquid of angle of contact which is greater than
Note: Capillarity is the ability of a liquid which flows in narrow spaces without any assistance and acts against gravity. It occurs because of the intermolecular forces between the liquid and the molecules of the narrow tube which is inserted in the container of the liquid.
Recently Updated Pages
Master Class 11 Business Studies: Engaging Questions & Answers for Success

Master Class 11 Economics: Engaging Questions & Answers for Success

Master Class 11 Accountancy: Engaging Questions & Answers for Success

Master Class 11 Computer Science: Engaging Questions & Answers for Success

Master Class 11 English: Engaging Questions & Answers for Success

Master Class 11 Maths: Engaging Questions & Answers for Success

Trending doubts
Which one is a true fish A Jellyfish B Starfish C Dogfish class 11 biology CBSE

The flightless birds Rhea Kiwi and Emu respectively class 11 biology CBSE

Difference Between Prokaryotic Cells and Eukaryotic Cells

1 ton equals to A 100 kg B 1000 kg C 10 kg D 10000 class 11 physics CBSE

One Metric ton is equal to kg A 10000 B 1000 C 100 class 11 physics CBSE

How much is 23 kg in pounds class 11 chemistry CBSE
