A mercury drop does not spread on a glass plate because the angle of contact between glass and mercury is

Acute

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Obtuse

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Zero

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90⁰

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Solution

The correct option is B
Obtuse

The angle of contact between glass and mercury is obtuse

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Explain why

(a) The angle of contact of mercury with glass is obtuse, while that of water with glass is acute.

(b) Water on a clean glass surface tends to spread out while mercury on the same surface tends to form drops. (Put differently, water wets glass while mercury does not.)

(d) Water with detergent dissolved in it should have small angles of contact.

(e) A drop of liquid under no external forces is always spherical in shape

Q. Explain why the angle of contact is acute for kerosene-glass pair and is obtuse for mercury-glass pair.

Q. On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because

The angle of contact between glass and mercury is

Q. The angle of contact between glass and mercury is :

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A mercury drop does not spread on a glass plate because the angle of contact between glass and mercury is

The correct option is B Obtuse The angle of contact between glass and mercury is obtuse

The correct option is B
Obtuse

The angle of contact between glass and mercury is obtuse