This set of Chemical Industry Multiple Choice Questions & Answers (MCQs) focuses on “Synthetic Organic Chemical – Pesticides”.
1. Which of the following manufacturer in India does not produce pesticide?
a) Bayer Limited
b) Bharat Rasayan Limited
c) Tata Chemicals Limited
d) Chemagro International Limited
View Answer
Explanation: Tata chemicals mainly produce soda, soda ash, cement, marine chemicals, soda bicarbonate whereas Bayer Limited, Bharat Rasayan Limited, and Chemagro International Limited are the significant producers of pesticide.
2. Which of the following is not an insecticide?
a) Dichloro-Diphenyl-Trichloroethane (DDT)
b) 2, 4-dichlorophenoxyacetic
c) Benzene Hexachloride (BHC)
d) Xanax
View Answer
Explanation: Xanax is known as the safest tranquilizer not as a pesticide whereas Dichloro-Diphenyl-Trichloroethane (DDT), 2, 4-dichlorophenoxyacetic acid and Benzene Hexachloride (BHC) are significantly known as pesticide with a large consumption across India.
3. Which of the following is not a type of a pesticide?
a) Herbicide
b) Silicide
c) Fungicide
d) Acaricides
View Answer
Explanation: Silicide is a chemical compound that has silicon having more electropositive elements whereas Herbicide is type of pesticide which is used to kill the growth of unwanted plants, Fungicide is used for killing the fungus and Acaricides is used to eliminate pest like mites and ticks.
4. India is the largest producer of Dichloro-Diphenyl-Trichloroethane (DDT).
a) True
b) False
View Answer
Explanation: India is the largest producer and consumer of Dichloro-Diphenyl-Trichloroethane (DDT). It is severely harmful to both humans and the environment. Due to such adverse effects, the Indian government has banned the use of DDT in India for agricultural purposes.
5. USA banned the use of Dichloro-Diphenyl-Trichloroethane (DDT) due to environmental and health concerns.
a) False
b) True
View Answer
Explanation: The United States has banned the use of Dichloro-Diphenyl-Trichloroethane (DDT) in 1972. Environmental Protection Agency (EPA) issued a cancellation order for DDT due to its harmful environmental effects on wildlife as well on human health.
6. What is the manufacturer code for Dichloro-Diphenyl-Trichloroethane (DDT) in India?
a) It is defined by number 5
b) It is defined by number 14
c) It is defined by number 10
d) It is defined by number 8
View Answer
Explanation: The manufacturer code is a unique code assigned to each manufacturer by the numbering authority. There are different codes for chlorine containing pesticides, for Dichloro-Diphenyl-Trichloroethane (DDT) it is defined by number 8. Also, pentachlorophenol is defined by number 5, lindane by number 10 and chlordane by number 14.
7. On what basis pesticides are classified?
a) Number of chlorine atoms present in the compound
b) Types and varieties of pest they target
c) On the basis of annual consumption
d) On the basis of their affectivity
View Answer
Explanation: The classification of pesticide is defined on the basis of their types and varieties of pest they target. Rodenticide aims at eliminating small rodents as rats. Herbicide eliminates unwanted growth of plant, Fungicides is used to kill fungus and Insecticides are used to kill insects as spiders, ticks.
8. What is Organophosphate pesticide?
a) Organophosphate pesticides destroy nervous system in insects and humans that cause paralysis and death
b) It is a new generation pesticide and now is used to replace Dichloro-Diphenyl-Trichloroethane (DDT)
c) This pesticide works on the principal of photochemistry and is suitable for areas which receives sunshine during whole year
d) Organophosphate pesticide is used to kill virus and bacteria smaller than 10−10 m
View Answer
Explanation: Organophosphate pesticides destroy nervous system in insects and humans that cause paralysis and death. It damages an enzyme in the body called acetyl cholinesterase. This enzyme is critical for controlling nerve signals in the body. Exposure can be from drinking, breathing in the vapors, or skin exposure.
9. Which process is defined by the figure given below in the field of organic process technology?
a) Crystallization
b) Filtration
c) Decantation
d) Fractionation
View Answer
Explanation: The above figure defines the process of crystallization in the field of chemical process technology. The figure has a tank, stirrer for cooling the solution inlets and outlets and a fork like structure on which the crystallization will occurs.
10. What is ovicide?
a) It is a type of fertilizer which provides complex nutrition to weaken plants
b) They are unique pesticides that kill the eggs laid by mites and insects
c) It is a banned pesticide which is now used as disinfectant
d) It is a type of algicide which is used in the treatment of blue-green algae
View Answer
Explanation: Ovicide is a type of pesticide which kills the eggs laid by mites and insects. It is also significant from the name ovicide. They were introduced in the field of agriculture to kill the insect before its birth, it means in the shell. First significant use of ovicide was in the year 1913.
11. What is major engineering problem with Dichloro-Diphenyl-Trichloroethane (DDT)?
a) It is difficult to carry out the reaction with concentrated sulfuric acid
b) The formation of Dichloro-Diphenyl-Trichloroethane (DDT) occurs at very high temperature
c) The reaction time for the formation is 10-12 hours
d) Contact of the Dichloro-Diphenyl-Trichloroethane (DDT) product with iron must be avoided
View Answer
Explanation: The formation of Dichloro-Diphenyl-Trichloroethane (DDT) involves the composition of different compounds. The contact of DDT with iron causes the decomposition of DDT. Hence it must not be stored or contacted with iron.
12. Which state consumed the most chemical pesticides in India in the past five years?
a) Punjab
b) Maharashtra
c) Uttar Pradesh
d) Haryana
View Answer
Explanation: Maharashtra consumed the most chemical pesticides in India in the past five years, approximately 61, 138 tons, followed by Uttar Pradesh with 52,747 tons and Punjab with 29, 394 tons of chemical pesticides.
13. The production of Benzene Hexachloride (BHC) is accompanied by which of the following reaction?
a) Substitution hydrolysis reaction
b) Condensation chlorination reaction
c) Addition chlorination reaction
d) Photochemical oxidation reaction
View Answer
Explanation: Addition chlorination reaction takes place in Benzene Hexachloride (BHC) manufacture using source of free radicals such as ultraviolet light to produce this reaction. The reaction is carried out between benzene and chlorine.
14. The manufacturing of 2, 4-dichlorophenoxyacetic acid is carried out at which temperature?
a) 40-50°C
b) 60-80°C
c) 90-100°C
d) 150-160°C
View Answer
Explanation: The temperature requires for the reaction to occur is between 60-80°C. The chloroacetic acid when added to the reaction it reacts with the evolution of heat. The optimum product extraction from the reaction takes place at this temperature.
15. Given chemical reaction is the fundamental reaction of which process?
CCl3CHO + 2C6H5Cl → (C6H4Cl)2 CHCCl3 + H2O
a) Dichloro-Diphenyl-Trichloroethane (DDT) manufacture
b) Dicofol manufacture
c) Benzene Hexachloride (BHC) manufacture
d) Lindane manufacture
View Answer
Explanation: The given chemical equation is the fundamental reaction of Dichloro-Diphenyl-Trichloroethane (DDT) manufacture. Here ethanol is converted to chloral by oxidation to acetaldehyde denoted by CCl3CHO (Chloral) and then followed by chlorination to chloral by using chlorobenzene denoted by C6H5Cl.
Sanfoundry Global Education & Learning Series – Chemical Industry.
To practice all areas of Chemical Industry, here is complete set of 1000+ Multiple Choice Questions and Answers.
If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]
- Check Chemical Engineering Books
- Practice Chemical Engineering MCQs
- Check Chemical Process Technology Books
- Apply for Chemical Engineering Internship
