Question

Define Scum
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Answer 1

$\huge\textsf{Scum:}$

$\huge{→}$ It is defined as a layer of unpleasant substance at the surface of liquid .

$\huge{→}$Film or layer of foul or extraneous matter that forms on the surface of a liquid.

$\huge{→}$The lake near the factory was covered with grey, foul-smelling scum.