Description : Guanidine group of argentine gives positive test with (A) Lead acetate (B) Sakaguchi reagent (C) Tricholoroacetic acid (D) Molisch’s reagent
Last Answer : Answer : B
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 : Presence of arginine can be detected by (A) Sakaguchi reaction (B) Million-Nasse reaction (C) Hopkins-Cole reaction (D) Gas chromatography
Description : Sakaguchi reaction is answered by (A) Lysine (B) Ornithine (C) Arginine (D) Arginino succinic acid
Last Answer : Answer : C
Description : Aromatic amino acids can be detected by (A) Sakaguchi reaction (B) Millon-Nasse reaction (C) Hopkins-Cole reaction (D) Xanthoproteic reaction
Last Answer : Answer : D
Description : The amino acid which contains a guanidine group is (A) Histidine (B) Arginine (C) Citrulline (D) Ornithine
Description : One of the following has a phenolic group: (A) Histidine (B) Hydroxy lysine (C) Seratonine (D) Hydroxy proline
Description : The hydrogen bonds between peptide linkages are interfered by (A) Guanidine (B) Uric acid (C) Salicylic acid (D) Oxalic acid
Description : The hydrogen bonds between peptide linkages of a protein molecules are interfered by (A) Guanidine (B) Uric acid (C) Oxalic acid (D) Salicylic acid
Description : If the amino group and a carboxylic group of the amino acid are attached to same carbon atom, the amino acid is called as (A) Alpha (B) Beta (C) Gamma (D) Epsilon
Description : Group that reacts in the Biuret test: (A) Peptide (B) Amino group (C) Carboxylic group (D) Aldehyde group
Description : If the amino group and a carboxylic group of the amino acid are attached to same carbon atom, the amino acid is called (A) Alpha (B) Beta (C) Gamma (D) Delta
Description : Deterioration of food (rancidity) is due to presence of (A) Cholesterol (B) Vitamin E (C) Peroxidation of lipids (D) Phenolic compounds
Description : Which nitrogen is protonated readily in the guanidine?
Last Answer : Which nitrogen is protonated readily in the guanidine? A. 1 B. 2 C. 3 D. none of the above
Description : Chlorophyll a molecule at its carbon atom 3 of the pyrrole ring II has one of the following (a) carboxylic group (b) magnesium (c) aldehyde group (d) methyl group
Last Answer : d) methyl group.
Description : The greater acidity of carboxylic acids compared to alcohols arises primarily from : (a) the electron-donating effect of the hydroxyl group (b) the electron-withdrawing effect of the carboxyl ... of α-hydrogens of carboxylic acids (d) the resonance stability associated with the carboxylate ion
Last Answer : the resonance stability associated with the carboxylate ion
Description : An isosteric replacement for carboxylic acid group is (A) pyrrole (B) isoxazole (C) phenol (D) tetrazole
Last Answer : (D)tetrazole
Description : The conversion of aldehyde having no alpha hydrogen to a mixture to a mixture of carboxylic acid and primary alcohol is known as cannizzaro reaction.
Last Answer : The conversion of aldehyde having no alpha hydrogen to a mixture to a mixture of carboxylic acid and primary ... final product is A. B. C. D.
Last Answer : The conversion of aldehyde having no alpha hydrogen to a mixture to a mixture of carboxylic acid and primary ... C. step III D. step I and II both
Description : The reaction between an alcohol and carboxylic acid leads to the formation of
Last Answer : The reaction between an alcohol and carboxylic acid leads to the formation of A. Aldehyde B. Ester C. Ketone D. Paraffins
Description : Polyesters are manufactured by the Polycondensation reaction of (A) Dibasic acid with dihydric alcohol (B) A single monomer (C) Carboxylic acid with ethylene
Last Answer : (A) Dibasic acid with dihydric alcohol
Description : Which reaction does not yield an ester as one of the products? (a) A carboxylic acid is heated with an alcohol (b) A Grignard reagent is added to a carboxylic acid (c) An acid halide is treated with an alcohol (d) An alkyl halide is heated with the salt of a carboxylic acid
Last Answer : A Grignard reagent is added to a carboxylic acid
Description : The characteristic reaction of carboxylic acids is : (a) electrophilic addition (b) electrophilic substitution (c) nucleophilic addition (d) nucleophilic substitution
Last Answer : nucleophilic substitution
Description : Dry ice on reaction with GR gives_______ a) Ester b) Carboxylic acid c) Aldehyde d) Ketone
Last Answer : b) Carboxylic acid
Description : Goitrogenic substance present in cabbage is (A) 5-vinyl-2 thio oxalzolidone (B) Pyridine-3-carboxylic acid (C) 3-Hydroxy-4, 5-dihydroxymethyl1–2-methyl pyridine (D) δ-ALA dehydratase
Description : Protein is a polymer of (A) Sugars (B) Phenols (C) Amino acids (D) Carboxylic acids
Description : The α-ketoacid is decarboxylated by H2O2 forming a carboxylic acid with one carbon atom less in the absence of the enzyme: (A) Catalase (B) Decarboxylase (C) Deaminase (D) Phosphatase
Description : From two amino acids peptide bond formation involves removal of one molecule of (A) Water (B) Ammonia (C) Carbondioxide (D) Carboxylic acid
Description : Amino acid with side chain containing basic groups is (A) 2-Amino 5-guanidovaleric acid (B) 2-Pyrrolidine carboxylic acid (C) 2-Amino 3-mercaptopropanoic acid (D) 2-Amino propanoic acid
Last Answer : (A) 2-Amino 5-guanidovaleric acid
Description : Plexiglass (also called Lucite) because of its high optical transparency is used for making lenses. It is chemically (A) Polymethyl methacrylate (PMMA) (B) Polytetrafluroethylene (PTFE) (C) Polycarbonates (D) Phenolic resins
Last Answer : (A) Polymethyl methacrylate (PMMA)
Description : Which of the following polymers shows the highest anti-tacking properties? (A) Melamine formaldehyde resin (B) Phenolic resin (C) Epoxy resin (D) Alkyd resin
Last Answer : (A) Melamine formaldehyde resin
Description : Polycondensation of saturated dicarboxylic acid with polyhydric alcohol produces (A) Epoxy resin (B) Polyamide (C) Alkyd resin (D) Phenolic resin
Last Answer : (C) Alkyd resin
Description : Condensation polymerisation of formaldehyde with __________ does not produce phenolic resin. (A) Resorcinol (B) Phenol (C) Para-cresol (D) Melamine
Last Answer : (D) Melamine
Description : Cation exchange resins used in water treatment is made from __________ resin. (A) Urea formaldehyde (B) Epoxy (C) Amino (D) Phenolic
Last Answer : (A) Urea formaldehyde
Description : __________ resins are produced by the condensation polymerisation of formaldehyde with urea or melamine. (A) Epoxy (B) Amino (C) Alkyd (D) Phenolic
Last Answer : (B) Amino
Description : The chemical nature of GA3 is (a) Phenolic (b) Terpene (c) Purine (d) Indole
Last Answer : (b) Terpene
Description : Which of the following is not an inhibitory substance governing seed dormancy? (a) Gibberellic acid (b) Abscisic acid (c) Phenolic acid (d) Para-ascorbic acid
Last Answer : a) Gibberellic acid
Description : The cooling medium used in dry quenching of coke is (A) Nitrogen (B) Air (C) Phenolic water (D) Carbon dioxide
Last Answer : (A) Nitrogen
Description : Phenolic water generated in coke ovens & by-product plant attached to an integrated steel plant containing phenol in concentration of less than 100 mg/litre can be removed by (A) Chlorination (B) Treating in biological oxygen pond (C) Chemical coagulation (D) None of these
Last Answer : (B) Treating in biological oxygen pond
Description : Phenolic water generated in coke ovens & by-product plant of a steel plant are disposed off by (A) Quenching of hot coke (B) Discharging in the river stream (C) Filtration and recycling for cooling coke oven gas (D) None of these
Last Answer : (A) Quenching of hot coke
Description : Phenolic antiseptics are added in the __________ soap. (A) Shaving (B) Medicated (C) Metallic (D) Transparent
Last Answer : (B) Medicated
Description : Pick up the synthetic resin from the following: (A) Urea resin (B) Phenolic resin (C) Resorcinol resin (D) All of these
Last Answer : Answer: Option D
Description : Pick up the correct statement from the following: (A) Plastics have generally low melting point (B) The coefficient of thermal expansion of plastics is about three times than that of steel (C) ... fibre-glass with phenolic resins has absorption coefficient of about 0.67 (D) All the above
Description : Root exudates of wheat and oats which has detrimental effects on wild mustard con tain a). Phenolic acid b). Alkaloids c). Sulphides d). Lactones
Last Answer : a). Phenolic acid
Description : .Phenolic acid as root exudates of which crop has detrimental effects on wild mustard? a). Wheat b). Oats c). Chickpea d). a & b
Last Answer : d). a & b
Description : Biuret reaction is specific for (A) –CONH-linkages (B) –CSNH2 group (C) –(NH)NH2 group (D) All of these
Description : The total number of carboxylic acid groups in the product P is
Last Answer : The total number of carboxylic acid groups in the product P is