Which class of pesticides kills insects by preventing chemical reactions?

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AProtoplasmic poison

BPhysical poison

CRespiratory poison

DNerve poison

Answer:

Physical poison - The pesticide or toxicant will not react chemically but kill the insect either by asphyxiation or desiccation.
Mineral oil closes the spiracles and causes asphyxiation. So mineral oil is used for soft bodied insects like aphids.
Activated clay exerts a physical effect on wax monolayer and create spaces so that depletion of moisture in insect cell occurs. Activated clay is used in storage pest management.
Eg: Mineral oil, Inert dusts - Ash, silicagel, activated clay.

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Which of the following options best describes the primary function of a scrubber in the context of air pollution control from industrial emissions?

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