Chemistry
The Latin word formica means ant. The name formic acid is derived from this Latin word because

this corrosive acid is secreted by ants to drive away their enemies
this acid, in ancient times, was used to eliminate ant-hills
ants are attracted by the odour of this acid
this acid was first obtained by the distillation of ants

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Chemistry
Sullage water is –

Waste water released from kitchen
Waste water released from toilets
Waste water released from hospitals
Waste water released from factories

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