Agricultural Chemicals: Pesticides Questions and Answers

Agricultural Chemicals: Pesticides MCQ (Multiple Choice Questions and Answers)

Question 1: Agricultural chemical denote

(A) Pesticides

(B) Pesticides and fertilizers

(C) Fertilizers and growth regulators

(D) Pesticides, fertilizers and growth regulators

Answer: (D)

Question 2: Growth regulators produce

(A) Stimulation of growth

(B) Retardation of growth

(C) Some cause stimulation while others bring about retardation

(D) Shedding of leaves

Answer: (C)

Question 3: Loss of agricultural productivity due to pests and diseasesis

(A) 1%

(B) 30%

(C) 5%

(D) 15%

Answer: (B)

Question 4: Household Pesticide sprays are

(A) Finit (flit)

(B) Finit and Baygon

(C) Finit, baygon, mosquito coils and cakes

(D) DDT

Answer: (B)

Question 5: Carbamates include

(A) Fungicides, herbicides and insecticides

(B) Insecticides only

(C) Herbicides, insecticides and nematicides

(D) Insecticides, nematicides and rodenticides

Answer: (A)

Question 6: The first organic pesticide to be used commercially was

(A) Bordeaux mixture

(B) Burgandy mixture

(C) DDT

(D) 2 : 4 – D

Answer: (C)

Question 7: Bordeaux mixture is

(A) Organochlorine

(B) Antibiotic

(C) Organophosphate

(D) Inorganic fungicide

Answer: (D)

Question 8: The most famous pesticide of world is

(A) BHC

(B) DDT

(C) Baygon

(D) Flit

Answer: (B)

Question 9: In India, the most, commonly used pesticide BHC is

(A) Carbamate

(B) Triazine

(C) Organochlorine

(D) Antibiotic

Answer: (C)

Question 10: The pesticide used in foundations of buildings for preventing termite attack is

(A) DDT

(B) BHC

(C) Endrin

(D) Aldrin

Answer: (D)

Question 11: The chemical present in Temik is

(A) Malathion

(B) Propoxur

(C) Carbofuran

(D) Aldicarb

Answer: (D)

  1. The chemical present in flit (finit) is

(A) Malathion

(B) DDT

(C) BHC

(D) Aldicarb

Answer: (A)

  1. The number of organophosphates synthesized is

(A) 1000

(B) 100

(C) 10,000

(D) 100,000

Answer: (D)

14: The mode of action of insecticides is through the attack on

(A) Respiratory system

(B) Nervous system

(C) Muscular system

(D) Both A and B

Answer: (D)

15: The common mode of action of herbicides is

(A) Blocking of xylem channels

(R) Blocking of phloem channels

(C) Blocking of photosystem II

(D) Blocking of photosystem I

Answer: (C)

  1. One of earliest pesticides employed by humans was

(A) Nicotine

(B) Margosa (Neem) leaves

(C) Pyrethrum

(D) DDT

Answer: (B)

17: An example of pesticide treadmill is

(A) Forty times increase in requirement for cotton

(B) Development of mosquito resistance to DDT, BHC, malathion and fenitrothion

(C) Decreasing use of pesticides due to introduction of biological control

(D) Decreasing use of pesticides due to decrease in the population of pests

Answer: (A)

18: DDT concentration increases in the human body because it is soluble in

(A) Water

(B) Vitamins

(C) Fat

(D) Protein

Answer: (C)

  1. Pest is

(A) Organism feeding on and damaging others

(B) Furgal pathogen attacking plants and animals

(C) Bacterial pathogen attacking plants and animals

(D) Viral pathogen attacking organisms

Answer: (A)

Question 20: DDT and 2, 4-D were introduced

(A) Towards end of World War II

(B) Towards beginning of World War II

(C) During World War I

(D) Just after thc World War I

Answer: (A)

2l: Bordeaux mixture is named after

(A) Scientist

(B) Chemical composition

(C) Country

(D) University

Answer: (D)

22: Insecticides kill

(A) Harmful insects

(B) Both harmful and useful insects

(C) Specific insects

(D) Only plant pests

Answer: (B)

  1. Which is organochlorine?

(A) Malathion

(B) Pararhion

(C) Aldicarh

(D) DDT

Answer: (D)

  1. Which one is an organophosphate?

(A) BHC

(B) Aldrin

(C) Fenitrothion

(D) Endosulphan

Answer: (C)

  1. A carbamate pesticide is

(A) Propoxur

(B) Simazine

(C) Atrazine

(D) Tetraethyl pyrophosphate

Answer: (A)

Question 26: Urea derivate pesticides belong to the category of

(A) Organochlorines

( B)Organophosphares

(C) Carbamates

(D) Triazines

Answer: (D)

27: Carbamates employed as insecticide are

(A) Phenylcarbamates

(B) Thiocarbamates

(C) Propoxur

(D) Dithiocarbamates

Answer: (C)

28: Carbamates used as fungicides are

(A) Thiocarbamates

(B) Dithiocarbamates

(C) Carbofuran

(D) Carbofuran and Aldicarb

Answer: (B)

  1. The pesticides having very low biodegradation and strong affinity for fatty tissues are

(A) Organochlorines

(B) Organophosphates

(C) Triazines

(D) Pyrethroids

Answer: (A)

  1. Pesticide ingredient methyl isocyanate which killed thousands in Bhopal gas tragedy is intermediate of

(A) Mustard gas

(B) Nitrous acid

(C) Carbaryl

(D) Carbon tetrachloride

Answer: (C)

Question 31: The most common pesticide used in India is

(A) DDT

(B) Endrin

(C) BHC

(D) Baygon

Answer: (C)

  1. Pesticides comprise

(A) Herbicides and insecticides

(B) Insecticides

(C) Insecticides, nematicides and rodenticides

(D) Fungicides, herbicides, insecticides, nematicides and rodenticides.

Answer: (D)

  1. Herbicide carbamates are

(A) Dithiocarbamates

(B) Thiocarbamates

(C) Phenyl carbamates

(D) Both B and C

Answer: (D)

  1. Household pesticides consist of

(A) Finit, Baygon, Mosquito repellent cakes and coils

(B) Finit and Baygon

(C) Finit/Flit

(D) DDT

Answer: (A)

Question 35: DDT is

(A) Carbamate

(B) Organophosphare

(C) Organochlorine

(D) Triazine

Answer: (C)

Question 36: First commercial pesticide was

(A) Burgandy mixture

(B) Bordeaux mixture

(C) DDT

(D) 2 : 4 – D

Answer: (B)

Question 37: Mode of pesticide action is similar in

(A) DDT and parathion

(B) Organochlorines and organophosphates

(C) Organochlorines and carbamates

(D) Organophosphates and carbamates

Answer: (D)

Question 38: BHC is

(A) Benzene hexachloride

(B) Benzene heptachloride

(C) Benzene hydrochloride

(D) BromiCe herbicide

Answer: (A)

Question 39: Herbicides prevent

(A) Transpiration

(B) Water absorption

(C) Translocation of salts

(D) Photolysis of water

Answer: (D)

Question 40: Pesticides generally attack

(A) Muscular system

(B) Respiratory system

(C) Nervous system

(D) Circulatory system

Answer: (C)

Question 41: Pests resistant to insecticides have

(A) Enzyrnes for metabolising toxins

(B) Ability to store toxin in fat

(C) Less permeable cuticles

(D) All the above

Answer: (D)

Question 42: Most effective pesticides are

(A) Carbamates

(B) Organochlorines

(C) Organophosphates

(D) All the above

Answer: (C)

Question 43: DDT content in Indian population has touched

(A) 1 – 12 ppm

(B) 11 – 30 ppm

(C) 25 – 50 ppm

(D) 48 – 98 ppm

Answer: (B)

Question 44: Which one is not matched?

(A) Organochlorine – DDT

(B) Pyrethroid – Atrazine

(C) Organophosphate – Malathion

(D) Carbamate – Carbofuran

Answer: (B)

Question 45: Pesticides with very low biodegradation but strong affinity for fatty tissues are

(A) Organochlorines

(B) Organophosphates

(C) Pyrethroids

(D) Triazines

Answer: (A)

Question 46: Bordeaux mixture was formulated by

(A) Leeuwenhoek

(B) Tillet

(C) De Bary

(D) Millardet

Answer: (D)

Question 47: Baygon contains

(A) Malathion

(B) Carbofuran

(C) Propoxur

(D) Aldicarb

Answer: (C)

Question 48: Which ingredient killed hundreds of people

in Bhopal gas tragedy ?

(A) Nitrous acid

(B) Mustard gas

(C) Carbon tetrachioride

(D) Methyl iscoyanate

Answer: (D)

Question 49: DDT is

(A) Biodegradable

(B) Non-biodegradahle

(C) Antibiotic

(D) Growth regulator

Answer: (B)

Question 50: Which is a fungicide?

(A) 2 : 4 – D

(B) DDT

(C) Bordeaux mixture

(D) BHC

Answer: (C)