A hydrophilic surface is characterised by the contact angle at the water soled interface. The value of contact angle should be

Options

A. `gt90^(@)`
B. `lt90^(@)`
C. `=90^(@)`
D. `=180^(@)`

Answer

B

Explanation

For a hydrophilic surface, the contact angle at the water solid interface is less than `90^(@)i.e.,lt90^(@)`. Since adhesive force between liquid and hydrophilic surface is very high.
Hence, the value of contact angle should be less than `90^(@)`