Description : What does biuret solution specifically react with to produce a color change?
Last Answer : amino acids
Description : Proteins react with biuret reagent which is suggestive of 2 or more (A) Hydrogen bonds (B) Peptide bonds (C) Disulphide bonds (D) Hydrophobic bonds
Last Answer : Answer : B
Description : Pick out the correct statement. (A) Reaction of NH3 with HNO3 to produce (NH4 )2NO3 is endothermic (B) With increase in NH3 /CO2 ratio, urea yield decreases for a given temperature, pressure and total ... (an intermediate during urea manufacture) is toxic to seeds and animals (D) Both (B) and (C)
Last Answer : (B) With increase in NH3 /CO2 ratio, urea yield decreases for a given temperature, pressure and total feed rate
Description : A protein solution on warming with concentrated HNO3 may turn yellow. This test is called : (a) Xanthoproteic test (b) Ninhydrin test (c) Biuret test (d) Million's test
Last Answer : Xanthoproteic test
Description : Choose the local anaesthetic that is specifically used to produce corneal anaesthesia for tonometry: A. Tetracaine B. Oxethazaine C. Ropivacaine D. Benoxinate
Last Answer : D. Benoxinate
Description : What samples gives a positive test with biuret test?
Last Answer : Biuret test is for peptide bonds.
Description : What are the Reaction of amino acid using ninhydrin and biuret reagent?
Last Answer : What is the answer ?
Description : A protein reacts with biuret reagent which indicates 2 or more (A) Blood clotting (B) Peptide bond (C) Disulphide bonds (D) Hydrophobic bonds
Description : Biuret test is specific for (A) Two peptide linkage (B) Phenolic group (C) Imidazole ring (D) None of these
Last Answer : Answer : A
Description : Indole group of tryptophan responses positively to (A) Glyoxylic acid (B) Schiff’s reagent (C) Biuret test (D) Resorcinol test
Description : Group that reacts in the Biuret test: (A) Peptide (B) Amino group (C) Carboxylic group (D) Aldehyde group
Description : The useful reagent for detection of amino acids is (A) Molisch reagent (B) Dichlorophenol Indophenol (C) Ninhydrin (D) Biuret
Last Answer : Answer : C
Description : Biuret reaction is specific for (A) –CONH-linkages (B) –CSNH2 group (C) –(NH)NH2 group (D) All of these
Description : What is the disadvantage of biuret method?
Last Answer : The sensitivity of the method is less and is un- suitable for estimation of proteins in milligram or microgram quantities.
Description : What is the advantage of biuret method?
Last Answer : The biuret method is simple one step process, and is the most widely used method for plasma pro- tein estimations.
Description : What is biuret?
Last Answer : The name is derived from the compound biuret, a condensation product of two urea molecules, which also gives a positive color test.
Description : What is the use of biuret reaction?
Last Answer : This reaction can be used for qualitative identifi- cation and quantitative estimation of proteins.
Description : Will amino acids give a positive biuret test?
Last Answer : No. This needs a minimum of two peptide bonds.
Description : What is biuret reaction?
Last Answer : Cupric ions in alkaline medium form a violet colour with peptide bond nitrogen.
Description : Prilling of urea should be accomplished (in a sprayer) just above the melting point of urea with minimum of retention time, otherwise it will result in (A) Low bulk density product (B) Biuret formation (C) Non-spherical prills (D) Substantially wet non-flowing and sticky product
Last Answer : (B) Biuret formation
Description : __________ is the undesirable by-product produced in the manufacture of urea. (A) Ammonium carbonate (B) Biuret (C) Carbon dioxide (D) Ammonium carbamate
Last Answer : (B) Biuret
Description : Biuret formation in urea is kept at minimum (< 1 %), because it is (A) Corrosive in nature (B) Toxic and harmful to some crops (C) Helpful in decomposition of urea (D) Explosive in nature
Last Answer : (B) Toxic and harmful to some crops
Description : . Chemical formula of biuret is (A) NH2 .CO.NH2 (B) NH3 .COO.NH3 (C) NH2CONHCONH2 (D) NH4COONH2
Last Answer : (C) NH2CONHCONH2
Description : Dehydration of ammonium carbamate produces (A) Urea (B) Biuret (C) Ammonia water (D) None of these
Last Answer : (A) Urea
Description : In the manufacture of urea, the intermediate chemical formed is (A) Biuret (B) Ammonium carbamate (C) Ammonium carbonate (D) None of these
Last Answer : (B) Ammonium carbamat
Description : Lower temperature and large excess of ammonia in urea melt (A) Increases biuret formation (B) Decreases biuret formation (C) Is undesirable (D) Does not effect biuret formation
Last Answer : (B) Decreases biuret formation
Description : Yield of urea can be increased with excess ammonia and higher pressure & temperature, but because of __________ this is normally not done. (A) Increased biuret formation (B) High corrosion rate (C) Increased cost of equipment (D) All (A), (B) & (C)
Last Answer : (D) All (A), (B) & (C)
Description : With increases in pressure, the conversion of Ammonium carbamate into urea (A) Increases (B) Decreases (C) Remains unaltered (D) Can either increase or decrease depends on biuret content
Last Answer : (A) Increases
Description : Which of the following tests is not used for testing proteins? (a) Ninhydrin test (b) Biuret test (c) Xanthoproteic test (d) Tollens' test
Last Answer : Tollens' test
Description : What happens when urea is treated with hydrazine? (a) Biuret is formed (b) Semicarbazide is formed (c) Carbon dioxide and nitrogen is formed (d) Acetamide is formed
Last Answer : Semicarbazide is formed
Description : Describe the following points with respect to manufacturing of Urea. (i) Temperature (ii) Pressure (iii) Formation of Biuret
Last Answer : Manufacturing of Urea w.r.t following points 1. Temperature: Urea production rate increases as temperature increases up to 180oC and then fall sharply. 2. Pressure: Urea production rate increases as pressure ... before sending to prilling tower. 2NH2 .CO.NH2 = NH2.CO.NH.CO.NH2 + NH
Description : Older drivers: How did you react when they first made you change your hair color to "gray" on your license?
Last Answer : they can make you do that? my license says blonde hair, and i’m obviously a brunette now. i haven’t changed it. i don’t think they pay attention to those details.
Description : Can the people who are against universal healthcare explain to me specifically why they are against it, and what they think is the best solution for health care in America?
Last Answer : I was in the military also and it was okay but it is not the same as my local charity hospital. I fear that place. I would sell stuff to be able to go to a private hospital before that place. I don’t know the answer but universal healthcare is not it either.
Last Answer : Alkali reacts with acid to produce salt and water
Last Answer : Sulfur reacts with water to produce sulfuric acid
Description : If 31.3 g of manganese(II) chloride 48.3 g of chlorine gas and 25.7 g of water react to produce manganese(IV) oxide and hydrochloric acid what is the limiting reactant and what mass of hydrochloric?
Last Answer : Need answer
Description : How many grams of Hg must react to produce 3.75 moles of O?
Description : (3) Oxides of nitrogen and sulphur Explanation: Acid rain is caused by emissions of oxides of Sulfur and Nitrogen (Sulfur Dioxide and Nitrogen Oxide), which react with the water molecules in the ... The emissions of sulfur dioxide (SO2) and nitrogen oxides (NOx) result from fossil fuel combustion.
Last Answer : (3) live wire and the neutral wire Explanation: Three wires enter most homes from the power pole-two "hot" wires and a third "neutral" wire. Each hot wire provides 120- volt current for ... the main switch is put off because the electric circuit (the path where the electricity travels) gets opened.
Description : (2) oxides of nitrogen and sulphur Explanation: Acid rain is caused by emissions of sulfur dioxide and nitrogen oxides, which react with the water molecules in the atmosphere to produce acids.
Last Answer : Neuron is - (1) Fundamental unit of energy (2) Particle released in radioactive emission (3) Antiparbcle of neutron (4) Fundamental unit of nervous system
Description : Which one of the following metals does not react with water to produce Hydrogen? (1) Cadmium (2) Lithium (3) Potassium (4) Sodium
Last Answer : (1) Cadmium Explanation: A cadmium metal does not react with water to produce Hydrogen.
Description : Which one of the following metals does not react with water to produce Hydrogen ? (1) Potassium (2) Cadmium (3) Sodium (4) Lithium
Last Answer : (2) Cadmium Explanation: Cadmium is a soft, malleable, ductile, bluish-white divalent metal. It is similar in many respects to zinc but forms complex compounds. Unlike other metals, cadmium is ... occurs as a minor component in most zinc ores and therefore is a byproduct of zinc production.
Description : Which one of the following metals does not react with water to produce hydrogen?
Last Answer : Cadmium
Description : Metallic oxides which react with both acid and base to produce salt and water are called A) Neutral Oxides B) Basic Oxides C) Amphoteric Oxides D) Acidic Oxides
Last Answer : C) Amphoteric Oxides
Description : Chlorine free radicals react with methane by : (a) donating their free-radical electron to methane to form chloromethane. (b) abstracting a hydrogen atom from methane, and producing ... produce chloromethane. (d) forming a carbonium ion intermediate that rapidly dissociates to form chloromethane
Last Answer : abstracting a hydrogen atom from methane, and producing HCl and a methyl radical
Description : Have you ever noticed a color or an outfit that makes people react differently towards you?
Last Answer : answer:It's not just folk wisdom that people judge you based on your appearance. And people, with just a little change of wardrobe and nothing else, can quite easily appear to be a certain ... applies to things like perceived race and gender performances, as well. It's not even conscious, often.
Description : Mebo is it a superstition?
Last Answer : It's a superstition. The bull sees only black and white and is enraged by a man waving a rag. It's red to make people like it more :)
Description : In the giver how would the elders react to the words choice color and ordinary?
Description : Which of the following hydrogen halides react with `AgNO_3` to give a precipitate that dissolves in hypo solution ? (I)HCl (II)HF (III)HI (IV)HBr
Last Answer : Which of the following hydrogen halides react with `AgNO_3` to give a precipitate that dissolves in hypo solution ? (I) ... II),(I) D. (II),(IV),(III)
Description : The number of moles of `KMnO_(4)` that will be needed to react completely with one mole of ferrous oxalate in acidic solution is:
Last Answer : The number of moles of `KMnO_(4)` that will be needed to react completely with one mole of ferrous oxalate in acidic ... //5` C. `3//5` D. `4//5`