Answer 1

Pesticides are a mixture of two or more substances. They are used for killing pests. Pests include insects, plant pathogens, weeds, mollusks, etc., that destroy the plant crop and spread diseases. Aldrin and dieldrin are the names of some common pesticides

Herbicides are pesticides specially meant for killing weeds. For example, sodium chlorate (NAClO₃), sodium arsenite (Na₃AsO₃), etc.

Answer 2

Pesticides are the chemical compounds used in agriculture to control the damages caused by insects, rodents, weeds and various crop diseases.

Example: Aldrin, Dilldrin, B.H.C etc.

Herbicides: These are the chemicals used to control weeds.
Example: Triazines.