Assignment 1. On Topic “ Chemistry”

Type 1. Multiple choice Questions

1. The compound responsible for the killing action of is called the:

(a) killing agent (b) active ingredient (c) toxic factor (d) lethal factor 2. What are the units of LD50?

(a) kilogram/gram of animal body weight

(b) milligrams/ kilogram of animal body weight

(c) milligrams/gram of animal body weight

(d) gram/gram of animal body weight 3. Which of the following compounds is not an organic substance?

(a) rotenone

(b) nicotine

(c)

(d) pyrethrum 4. Pesticides used to control plant are called: (a) Toxicols (b) fungicides (c) weed agents (d) Herbicides 5. Which are the pesticides (a) (b) (c) DDT (d) Alachlor 6. Which of the following is the synthetic pesticides? (a) Rotenone (b) DDT (c) Nicotine (d) ’s 7. Dealing with the LD50 rating, a herbicide with a label warning of "danger-poison" would have what type of toxicity rating

(a) Moderate (b) Low (c) Slight (d) High

Question Type 2. 1. Write the name of two banned pesticides from India 2. Write the structure of following pesticides:

(a) DDT (b) Malathion (c) (d) Gammaxene (e) 3. What do you understand about the nerve agent ?, mention the name of any two nerve agent. 4. Which one is more toxic, malathion or and why? 5. Which one is more toxic, parathion or and why? Question Type 3. 6. What do you understand by pesticides? Describes the merits and demerits of the pesticides.

7. What are the natural and synthetic pesticides? write the name of two natural and two synthetic pesticides.

8. Define term pesticides, what are the different types of pesticides on the basis of their structure.

9. Write down the effect of pesticides on human beings.

10. Write short notes on following:

(a) DDT (b) Malathion (c) Parathion (d) Gammaxene (e) Carbofuran (f) Butachlor 11. Describe the mode of action of (a) organophosphate pesticides and 12. What is the structural difference in organophosphate and pesticides. 13. Describe the structure activity relationship.