#DDT

(a) What are Pesticides? Explain their different types; why persistent pesticides are more lethal for mankind? (b) What are carbohydrates? Classify and give detail of each class along with examples. (c) Discuss different methods of Food preservation. (d) Where and how Fiber Optics are used? Also write down their advantages and disadvantages.

#cssnexus #Pesticides #Types of Pesticides #Persistent Pesticides