6. (a) What do you understand by the term
meniscus?
(b) Name the kind of meniscus formed (i) in case
of water, (ii) in case of mercury.
Answers
Answer:
ANSWER
(a) What do you understand by the term meniscus?
The meniscus (plural: menisci, from the Greek for "crescent") is the curve in the upper surface of a liquid close to the surface of the container or another object, caused by surface tension. It can be either convex or concave, depending on the liquid and the surface.
(b) Name the kind of meniscus formed
(i) in case of water
Concave meniscus is formed. Water is made up of polar molecules, which have positively and negatively charged ends. Since opposites attract, the positive sides attract the negative sides, and all of the molecules stick to one another. This is why water droplets can form. Glass molecules also happen to be polar. Again, since polar molecules like to stick together, the water in a glass tube will actually tend to stick to the sides of the tube. You can see this at the top of the graduated cylinder, where the water will slightly creep up the sides and form a curve, which is the meniscus.
(ii) in case of mercury
Convex meniscus is formed. The reason for this happening is because of cohesion and adhesion. Meniscus is the curve of the upper surface in any liquid. It can be convex with is the curving outward or bulge outward. Concave is just the opposite
HOPE THIS HELPS YOU..............
PLZ MARK AS BRAINLEST................
Explanation:
ANSWER
(a) What do you understand by the term meniscus?
The meniscus (plural: menisci, from the Greek for "crescent") is the curve in the upper surface of a liquid close to the surface of the container or another object, caused by surface tension. It can be either convex or concave, depending on the liquid and the surface.
(b) Name the kind of meniscus formed
(i) in case of water
Concave meniscus is formed. Water is made up of polar molecules, which have positively and negatively charged ends. Since opposites attract, the positive sides attract the negative sides, and all of the molecules stick to one another. This is why water droplets can form. Glass molecules also happen to be polar. Again, since polar molecules like to stick together, the water in a glass tube will actually tend to stick to the sides of the tube. You can see this at the top of the graduated cylinder, where the water will slightly creep up the sides and form a curve, which is the meniscus.
(ii) in case of mercury
Convex meniscus is formed. The reason for this happening is because of cohesion and adhesion. Meniscus is the curve of the upper surface in any liquid. It can be convex with is the curving outward or bulge outward. Concave is just the opposite.
hope it's helpful to you