Description : performance of naphthalic anhydride against EPTC was marginal in which type of soils a).clay b). clay loam c). loamy d). sandy silt
Last Answer : d). sandy silt
Description : Naphthalic anhydride is an a). a safener b). an adjuvant c). an emulsifier d). a pellet
Last Answer : a). a safener
Description : Physical removal/loss of herbicides a). Adsorption b). Hydrolysis c). Deamination d). Dealkylation
Last Answer : a). Adsorption
Description : Dealkylation involving removal of alkyl side chains is common in case of a). Triazines b). Carbamates c). Donitroanilines d). All
Last Answer : d). All
Description : The major means for herbicide dissipation is which type of following degradation a). Microbial b). Chemical c). photo d). Physical
Last Answer : a). Microbial
Description : Decarboxylation is most common in a). Phenoxy’s b). Benzoics c). Substituted ureas d). All
Description : Processes that break down the herbicides after application includes............................ a). Photo and microbial degradation b). adsorption and uptake c). leaching and runoff d). volatilization and run off
Last Answer : a). Photo and microbial degradation
Description : A transport process in herbicide removal a).volatilization b).photo-decomposition c).chemical decomposition d).microbial degradation
Last Answer : a).volatilization
Description : In soils with low fertility, the degradation of herbicides is a). Slow b). Constant c). Fast d). no effect
Last Answer : a). Slow
Description : Change in molecular structure of applied herbicides inside the plant is known as a). Conjugation b). Metabolism c). Reverse metabolism d). Degradation
Last Answer : b). Metabolism
Description : Study the pathway given below. Atmospheric CO2 mesophyll cell Bundle sheath cell Plasma- desmata Plasma membrane Cell wall HCO Phosphoenol- 3 - pyruvate Cell wall C acid ... b) Fixation Transamination Regeneration (c) Fixation Decarboxylation Regeneration (d) Carboxylation Decarboxylation Reduction
Last Answer : (c) Fixation Decarboxylation Regeneration
Description : An enzymatic beta-oxidation process a). Conjugation b). Reverse metabolism c). Translocation d). Metabolism
Last Answer : b). Reverse metabolism
Description : Chemigation is the process of application through a). Irrigation water b). Foliar spray c). Soil application d). Basal application
Last Answer : a). Irrigation water
Description : Six months after beginning atorvastatin, the patient's total and LDL cholesterol concentrations remained above normal and he continued to have anginal attacks despite good adherence to his antianginal ... Increased endocytosis of HDL by the liver (e) Increased lipid hydrolysis by lipoprotein lipase
Last Answer : Ans: C
Description : Epinephrine is derived from norepinephrine by (A) Decarboxylation (B) Hydroxylation (C) Oxidation (D) N-methylation
Last Answer : Answer : D
Description : Malic enzyme convers malic acid, in the presence of NADP+ to Pyruvic acid. This reaction is a/an (A) Decarboxylation (B) Decarboxylation and Dehydrogenation (C) Dehydrogenation (D) Oxidation
Last Answer : Answer : B
Description : Pantothenic acid is a constituent of coenzyme involved in (A) Acetylation (B) Decarboxylation (C) Dehydrogenation (D) Oxidation
Last Answer : Answer : A
Description : Pantothenic acid is a constituent of the coenzyme involved in (A) Decarboxylation (B) Dehydrogenation (C) Acetylation (D) Oxidation
Last Answer : Answer : C
Description : Biluveridin is converted to bilirubin by the process of (A) Oxidation (B) Reduction (C) Conjugation (D) Decarboxylation
Description : NADPH required for fatty acid synthesis can come from (A) Hexose monophosphate shunt (B) Oxidative decarboxylation of malate (C) Extramitochondrial oxidation of isocitrate (D) All of these
Description : The rate limiting step in the biosynthesis of catecholamines is (A) Decarboxylation of dihydroxyphenylalanine (B) Hydroxylation of phenylalanine (C) Hydroxylation of tyrosine (D) Oxidation of dopamine
Last Answer : (C) Acetylation
Description : The preferred reacting system for oxidation of o-xylene to phthalic anhydride is (A) Jacketed liquid phase CSTR (B) Jacketed steam heated multitubular reactor (C) Multitubular reactor with cooling (D) Multistage multitubular reactor with interstage cooling
Last Answer : (A) Jacketed liquid phase CSTR
Description : Phthalic anhydride is made by the (A) Oxidation of naphthalene (B) Oxidation of benzene (C) Dehydrogenation of ethyl benzene (D) None of these
Last Answer : (A) Oxidation of naphthalene
Description : Phthalic anhydride is produced by the oxidation of (A) Naphthalene (B) Benzene (C) Toluene (D) Aniline
Last Answer : (B) Benzene
Description : Catalytic oxidation-dehydrogenation of methyl alcohol produces (A) Formaldehyde (B) Phenol (C) Acetone (D) Maleic anhydride
Last Answer : (A) Formaldehyde
Description : Catalytic oxidation of naphthalene produces (A) Styrene (B) Phenol (C) Phthalic anhydride (D) None of these
Last Answer : (C) Phthalic anhydride
Description : Oxidation of ortho-xylene in presence of __________ catalyst is done to produce phthalic anhydride on commercial scale. (A) Nickel (B) Vanadium (C) Alumina (D) Iron
Last Answer : (B) Vanadium
Description : Catalyst used in the oxidation of benzene to produce Maleic anhydride is (A) V2O5 (B) Pt (C) Ni (D) Cr
Last Answer : (A) V2O5
Description : Maleic anhydride is produced by catalytic oxidation of (A) Toluene (B) Ethyl alcohol (C) Naphthalene (D) Benzene
Last Answer : (D) Benzene
Description : A concentrated band of a herbicide about 7 -10 cm below the soil surface is required to control a). Cyperus rotundus b). Convolvulus arvensis c). Oxalis d). All
Description : Herbicide loss by volatilization increases as which of the following increases a). Vapour pressure b). Soil moisture content c). Soil temperature d). all
Last Answer : d). all
Description : Persistence herbicides pose hazard in soil when a). High persistence herbicides are used b). Crop failure necessitate re-planting c). Susceptible crop follows a short crop d). All
Description : Herbicide residue in soil are undesirable because of a). Injury to sensitive crops b). Accumulate in the produce c). Inhibit soil micro-organisma d). All
Description : Herbicides of which group are generally incorporated in soil? a). Carbamate b). Dinitroaniline c). Triazine d). Both a and b
Last Answer : d). Both a and b
Description : Typically pre-plant soil incorporated herbi cide a). Fluchloralin b). Trifluralin c). EPTC d). All of these
Last Answer : d). All of these
Description : A herbicide both soil and foliage active a). 2,4-D b). Isoproturon c). Diuron d). All of these
Description : Which is soil acting herbicide? a). Fluchloralin b). EPTC c). Both a and b d). Glyphosate
Last Answer : c). Both a and b
Description : An eradication method of weed control a). Killing underground parts of weeds by tillage b). Using soil sterilants c). Repeated foliar application on perennial weeds d). All of these
Description : Most dominant factor influencing weed composition in a field is a). Soil moisture b). Soil type c). Soil texture d). Soil temperature
Last Answer : a). Soil moisture
Description : Industrial weeds can be controlled by using a). Non selective herbicides b). Selective herbicides c). Soil sterilants d). Both a and c
Last Answer : d). Both a and c
Description : A dominant weed of puddle paddy soil a). Echinochloa b). Caesulina c). Eclipta sp d). All of these
Description : Environmental factors which increases the allelopathic effects are a).low soil fertility b). Warm wet condition c). Cold wet conditions d). a and b
Last Answer : d). a and b
Description : Herbicide application is mainly influenced by a). Application rate, timing and methods b). Application rate, weather conditions and soil types c). weather conditions, soil types and water chemistry d). All
Last Answer : a). Application rate, timing and methods
Description : In a soil-free system, the most effective safener was the ……………….one most in structure to the herbicide a). similar b). different c). systematic d). contact
Last Answer : a). similar
Description : A herbicide applied to the soil before planting a crop is called a a). pre-emergence b). Post-emergence c). Pre-plant d). None
Last Answer : c). Pre-plant
Description : What herbicide classification does 2-4- D fall into? a). Soil, Short residual, non-selective b). Foliage, contact, non-selective c). Foliage, translocative, selective d). Soil, Long residual, selective
Last Answer : c). Foliage, translocative, selective
Description : Which of the following herbicides will be tightly bound to the soil? a). Trifluralin KOC(mL/g)= 7000 b). Paraquat KOC(mL/g)= 10,00,000 c). Glyphosate KOC(mL/g)= 24,000 d). Alachlor KOC(mL/g)= 124
Last Answer : b). Paraquat KOC(mL/g)= 10,00,000
Description : Herbicides are less effective on weeds under which of the soil condition a). Field capacity b). Saturated c). Both a and b d). Dry
Last Answer : d). Dry
Description : The greatest factor affecting herbicide adsorption is a). pH b). Salt c). SOM d). Soil nutrient
Last Answer : c). SOM