If a liquid has greater cohesion than adhesion with the solid then the liquid in capillary tube will
Answers
Answer:
Explanation:then the angle of contact between the surface of liquid and capillary tube greater than 90° (obtuse), and the surface of liquid will be convex to upwards.
If a liquid has greater cohesion than adhesion with solid, then the liquid in a capillary tube will have a convex meniscus.
• Cohesion is the property of the liquid molecules to join or stick together by attractive forces such as hydrogen bonding or vander waals forces depending upon the tupe of liquid.
• Adhesion is the property of the liquid molecules to adhere or stick to walls of the capillary tube by the attractive forces acting between the liquid molecules and the walls of the tube.
• If the cohesion between the liquid molecules is stronger than the adhesion to the capillary tube, it means that the liquid molecules are attracted more to each other than the walls of the tube.
• This creates a surface tension between the liquid and the walls of the capillary tube
• This is why the liquid molecules pull themselves up, creating an angle of more than 90 degrees with the walls of the capillary tube, giving the liquid surface a convex meniscus bulging upwards (refer to the attachment below).
• Meniscus is the upper curved surface of a liquid which is either curved upwards or downwards depending upon the strength of cohesive and adhesive forces in a liquid.
