BIOCHEMISTRY
POLAR AND NONPOLAR MOLECULES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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mercury is more attracted to the sides of the test tube than it is to itself
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mercury is more attracted to itself than it is to the sides of the container
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mercury is attracted equally to itself and to the container
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what is a meniscus?
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Detailed explanation-1: -A convex meniscus occurs when the molecules have a stronger attraction to each other than to the container, as with mercury and glass.
Detailed explanation-2: -Well that is a good question the answer is: Mercury is more attracted to itself than the glass. Mercury is more cohesive than adhesive.
Detailed explanation-3: -Mercury shows a convex meniscus (the centre is higher than the edges), because internal cohesive forces are stronger than the force between the glass wall and the metal. In contrast, water exhibits a concave meniscus, because the attraction between the wall and the water is stronger than the water’s internal cohesion.
Detailed explanation-4: -As the angle of contact is obtuse for glass and mercury, the meniscus in the capillary tube is convex.