Question

5. Some mercury is contained in a test tube. The exposed surface of mercury is

(a) flat
(b) convex
(c) concave
(d) wavy ​

Answer 1

Answer:

Assuming the test tube is made of glass, the mercury has obtuse angle of contact. Hence, the outer surface will be convex, unlike water (which has concave surface due to acute contact angle).

Explanation:

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Answer 2

Answer:

Assuming the test tube is made of glass, the mercury has obtuse angle of contact. Hence, the outer surface will be convex, unlike water (which has concave surface due to acute contact angle)

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