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NCERT Class XI Chemistry Environmental Chemistry Solutions

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Question : 15
Total: 20
What are pesticides and herbicides? Explain giving examples.
Solution:  
(a) Pesticides : They are chemicals that are used to kill pests. They act by blocking the neurotransmission in the pest. e.g., DDT, BHC, etc.
(b) Herbicides : They are chemicals such as NaClO3,Na3AsO3 which are used to control the population of weeds in the fields.
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