A liquid does not wet the solid surface if angle of contact is

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zero

greater than 90⁰

equal to 45⁰

equal to 60⁰

answer is C.

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Detailed Solution

The wetting and non-wetting of a solid surface when in contact with a liquid depends on the contact angle between them.
A liquid does not wet the surface when angle of contact between them is more than 90°. For example Mercury.
A liquid wet the surface when angle of contact between them is less than $90 ° .$ For example water.

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