Interpretation:
The reason for water to form a meniscus when it is in graduated cylinder must be explained.
Concept introduction:
When water is in graduated cylinder then there is formation of curve on the surface. This is known as meniscus.
Answer to Problem 23SSC
Water forms meniscus due to surface tension.
Explanation of Solution
The molecules which are at the bulk are enjoying equal force in all direction. So net force n the molecule is zero. However molecules at the surface are not enjoying equal forces in all the direction. There is no force upward so the downward force is not counterbalanced. Thus there is a resulting downward force which makes the meniscus.
Surface tension of water creates the meniscus when water is kept in a graduated cylinder.
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