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Q.1
Agricultural Chemicals- ICAR JRF/SRF 2024 (Q.41)
MCQ (Single Correct) +4 −1

Solubility of Fe(III) oxides decreases in the order:

(A) . a-Fe203 (Hematite)
(B) . a-FeOOH (Ggoethite)
(C) . y-Fe203 (Maghemite
(D) . y-FeOOH (Lepidocrocite)

Choose the correct answer from the options given below:

Agricultural Chemicals Subjects

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Agrochemical Formulations

2 Topics
Pesticide Formulation Types: EC, WP, SC, WG, Granules, Microencapsulated Suspensions & Controlled-Release Systems Formulation Adjuvants, Surfactants, Wetting Agents, Emulsifiers, Molecular Sieves, Nano-Pesticides & Quality Testing

Agrochemicals - Regulation and Quality Control

2 Topics
International Standards & Quality Compliance: FSSAI, Codex Alimentarius, Good Laboratory Practice (GLP), WTO-SPS Agreement & Banned Pesticides Pesticide Legislation: Insecticides Act 1968, Insecticides Rules 1971, Central Insecticides Board & Registration Committee (CIB&RC)

Chemistry of Natural Products

2 Topics
Plant Biopolymers (Chitin, Hemicellulose, Lignin), Carotenoids, Phytochemical Extraction & Structure Elucidation Secondary Metabolite Classes: Alkaloids, Terpenoids, Phenolics, Flavonoids, Saponins, Lignans (Enterodiol) & Glucosinolates (Sinigrin)

Chromatography and Spectroscopic Techniques

2 Topics
Chromatographic Separation Methods: Column, TLC, Ion-Exchange, Gas Chromatography (GC-FID/ECD) & HPLC (UV/RID) Spectroscopic & Hyphenated Analytics: UV-Vis, FTIR, NMR (1H/13C), High-Resolution Mass Spectrometry (HRMS, Orbitrap), GC-MS & LC-MS/MS

Data Analysis

2 Topics
Agrochemical Statistics: Descriptive Parameters, Linear & Non-Linear Calibration Curves, Probit Analysis (LC50, LD50 Determination) Analytical Experimental Inference: ANOVA, Student's t-Test, F-Test, Regression Models & Residue Half-Life Calculations

Environment Pollution: Implications and Remediation

2 Topics
Agrochemical Toxicology: Acute/Chronic Toxicity, NOAEL Units, Teratogenicity, Non-Target Hazards (Pollinators, Fish) & Universal Antidotes Persistent Organic Pollutants (POPs), Stockpiles, Obsolete Pesticide Disposal, Bioremediation & Effluent Treatment

General Agriculture

5 Topics
Soil Science, Plant Nutrition & Reclamation Crop Genetics, Plant Breeding & IPR Agricultural Meteorology & Climate Science Agronomy, Tillage & Field Crop Production Cell Biology, Plant Physiology & Biochemistry

General Chemistry

2 Topics
Stereochemistry, Asymmetric Synthesis, Optical Isomerism, Chirality, Enantiomers, Diastereomers & Reactive Intermediates (Carbenes, Radicals) Organic Reaction Mechanisms: Nucleophilic & Electrophilic Substitutions (SN1/SN2), Addition, Elimination & Named Organic Reactions Active

Herbicides and Plant Growth Regulators

2 Topics
Herbicide Chemistry & Modes of Action: Phenoxy Acids (2,4-D), Triazines, Sulfonylureas, AOPPs (Fluazifop), EPSPS Inhibitors & Safeners Plant Growth Regulators: Auxins, Gibberellins, Cytokinins, Abscisic Acid, Ethylene Generators & Brassinosteroids

Natural Resource Management

2 Topics
Fertilizer Chemistry & Manufacturing: Urea, Phosphatic Fertilizers (DAP, SSP), Potassic Salts, Liquid Fertilizers & Nitrification Inhibitors Soil Conditioners, Superabsorbent Hydrogels, Biofertilizers & Environmental Mineral Management

Naturally Occurring Insecticides

1 Topic
Botanical Insecticides: Natural Pyrethrins, Neem Limonoids (Azadirachtin, Azadiradione), Rotenone & Nicotine

Pesticide Residues and their Dynamics in the Environment

2 Topics
Sample Preparation & Extraction: QuEChERS Technique (PSA, GCB Sorbents), Accelerated Solvent Extraction (ASE) & Multi-Residue Clean-Up Environmental Fate & Residue Kinetics: Sorption, Partition Coefficient (Kow), Photolysis, Soil Leaching, Persistence, LOD/LOQ & MRLs

Synthetic Insecticides, Fungicides, Nematicides and Rodenticides

2 Topics
Synthetic Insecticides & Acaricides: Organophosphates, Carbamates, Synthetic Pyrethroids (Cypermethrin), Neonicotinoids & Chitin Inhibitors Synthetic Fungicides, Nematicides & Rodenticides: Dithiocarbamates (Mancozeb), Phthalimides (Captan, Folpet), Triazoles (Hexaconazole), Anticoagulants & Fumigants
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