Description : Reaction of an alcohol with organic acid is called the __________ reaction. (A) Saponification (B) Esterification (C) Neutralisation (D) Acidification
Last Answer : (B) Esterification
Description : The hydrolysis of a fat using a solution of a strong hydroxide is called: w) neutralization x) esterification y) saponification z) condensation
Last Answer : ANSWER: Y -- SAPONIFICATION
Description : Saponification: (A) Hydrolysis of fats by alkali (B) Hydrolysis of glycerol by liposes (C) Esterification (D) Reduction
Last Answer : Answer : A
Description : Oils and fats are converted to soap in a process called (A) Hydrogenation (B) Esterification (C) Saponification (D) None of these
Last Answer : (C) Saponification
Description : Alkaline hydrolysis of oils (or fats) is called : (a) Saponification (b) Fermentation (c) Diazotization (d) Rancidification
Last Answer : Saponification
Description : Which of the following esters produces butyric acid and phenol on hydrolysis? (a) Phenyl butyrate (b) Butyl benzoate (c) Benzyl propionate (d) Phenyl propionate
Last Answer : Phenyl butyrate
Description : Liquid oils can be converted to solid fats by (a) Hydrogenation (b) Saponification (c) Hydrolysis (d) Oxidation of double bonds
Last Answer : Hydrogenation
Description : Hydrolysis of sugar is called (A) Hydration (B) Inversion (C) Esterification (D) None of these
Last Answer : (B) Inversion
Description : Alcohol is produced by the (A) Oxidation of an aldehyde (B) Hydrolysis of an ether (C) Esterification of a fat (D) None of these
Last Answer : (B) Hydrolysis of an ether
Description : Ethyl alcohol cannot be produced (A) From waste sulphite substrate of paper mills (B) By Esterification and hydrolysis of ethylene (C) From molasses (D) None of these
Last Answer : (D) None of these
Description : Hydrolysis of fats by alkali is called (A) Saponification number (B) Saponification (C) Both (A) and (B) (D) None of these
Last Answer : Answer : B
Description : Saponification involves the hydrolysis of fats and oils by- (1) water (2) washing soda (3) stearic acid (4) caustic soda
Last Answer : (4) caustic soda Explanation: Caustic soda (sodium hydroxide) is a versatile alkali. Its main uses are in the manufacture of pulp and paper, alumina, soap and detergents, petroleum products and chemical production.
Description : The process involved in making soap is (1) Saponification (2) Hydrolysis (3) Condensation (4) Polymerization
Last Answer : (1) Saponification Explanation: Saponification is a process that produces soap, usually from fats and lye. In technical teens, saponification involves base (usually caustic soda NaOH) hydrolysis ... of a carboxylate. In addition to soap, such traditional saponification processes produces glycerol.
Description : The process involved in making soap is (1) saponification (2) hydrolysis (3) condensation (4) polymerisation
Last Answer : saponification
Description : Why do aldehydes undergo nucleophilic addition reactions while esters undergo nucleophilic acyl substitution reactions? (a) The carbonyl carbon of an ester is more electrophilic than that of an aldehyde. (b) ... adds to an aldehyde, neither H− nor R− can be eliminated since they are strongly basic
Last Answer : Once the nucleophile adds to an aldehyde, neither H− nor R− can be eliminated since they are strongly basic
Description : The basic constituent of vegetable oils is (A) Triglyceride (B) Fatty acids (C) Fatty alcohol (D) Mono esters
Last Answer : (A) Triglyceride
Description : Can tertiary amines undergo acetylation reactions ? Explain.
Last Answer : For an amine to undergo acetylation, it should have a replaceable hydrogen atom. Tertiary amines cannot undergo acetylation reactions because these do not have replaceable hydrogen atom.
Description : Alcoholic OH) group can be identified by : (1) Tolien's Reagent Test (2) Esterification Test (3) FeCl3 Test (4) Ozonolysis Reaction
Last Answer : (3) FeCl3 Test Explanation: As phenol is an aromatic alcohol, so FeCl3 test is a test for alcohol and esterificaton test is also a test for alcohol. The ferric chloride test is used to determine the presence or absence of phenols in a given sample (for instance natural phenols in a plant extract).
Description : Which of the following conditions will drive the equilibrium of the Fischer esterification towards ester formation? (a) addition of water (b) removal of water as it is formed (c) addition of alcohol (d) both (b) and (c)
Last Answer : both (b) and (c)
Description : When an aldehyde is heated with Fehling's solution, the aldehyde undergoes one of the following processes. Does it undergo: w) neutralization x) oxidation y) reduction z) esterification
Last Answer : ANSWER: X -- OXIDATION
Description : Alcoholic (– OH) group can be identified by : (1) Tollen's Reagent Test (2) Esterification Test (3) FeCl3 Test (4) Ozonolysis Reaction
Last Answer : FeCl3 Test
Description : Benzoyl chloride on basic-hydrolysis (NaOH/H2O) gives : (a) Benzoic acid (b) Methyl benzoate (c) Sodium benzoate (d) Ethyl benzoate
Last Answer : Sodium benzoate
Description : The ethyl derivative of acetoacetic ester on basic-hydrolysis gives (a) Acetic acid (b) Acetic acid and propionic acid (c) Propionic acid (d) Acetic acid and n-butyric acid
Last Answer : Acetic acid
Description : During preparation of esters from a carboxylic acid and an alcohol in the presence of an acid catalyst, water or the ester formed should be removed as soon as it is formed.
Last Answer : Ans. The formation of esters from a carboxylic acid and an alcohol in the presence of acid catalyst in a reversible reaction. To shift the equilibrium in the forward direction, the water or ester formed should be removed as fast as it is formed.
Description : Which of the following statements best describes the structure of waxes? (a) long-chain unsaturated carboxylic acids (b) long-chain saturated carboxylic acids (c) long-chain esters (d) short-chain esters
Last Answer : long-chain esters
Description : Esters can be formed by nucleophilic substitution reactions of : (a) carboxylic acids and alcohols ; acid-catalyzed (b) acid chlorides and alcohols (c) both of the above (d) neither of the above
Last Answer : both of the above
Description : Which of the following acid-derivatives are most stable? (a) Acid chlorides (b) Esters (c) Amides (d) Anhydrides
Last Answer : Amides
Description : Esters and amides are most easily made by nucleophilic acyl substitution reactions on : (a) acid anhydrides (b) carboxylates (c) carboxylic acids (d) acid chlorides
Last Answer : acid chlorides
Description : Chemically, fats are esters of long carbon-chain acids and which of the following: w) ethanol x) glycerol y) ethylene glycol z) sodium hydroxide
Last Answer : ANSWER: X -- GLYCEROL
Description : Drug called ‘Heroin’ is synthesised by (a) nitration of morphine (b) methylation of morphine (c) acetylation of morphine (d) glycosylation of morphine.
Last Answer : (c) acetylation of morphine
Description : The degree of unsaturation of a fat can be determined by means of its (a) Iodine number (b) Octane number (c) Saponification number (d) Melting point
Last Answer : Iodine number
Description : Saponification of a fat (a) always results in the formation of insoluble soaps (b) produces glycerol and soap (c) is used in the production of detergents (d) is used in the production of lactic acid
Last Answer : produces glycerol and soap
Description : Sodium phenoxide when heated with `CO_(2)` under pressure at `125^(@) C` yield a product which on acetylation gives product `C`
Last Answer : Sodium phenoxide when heated with `CO_(2)` under pressure at `125^(@) C` yield a product which on acetylation gives product `C` A. B. C. D.
Last Answer : Sodium phenoxide when heated with `CO_(2)` under pressure at `125^(@) C` yield a ... B. salicyladehyde C. sodium benzoate D. sodium salicylate
Description : Pantothenic acid is a constituent of coenzyme involved in (A) Acetylation (B) Decarboxylation (C) Dehydrogenation (D) Oxidation
Description : Pantothenic acid is a constituent of the coenzyme involved in (A) Decarboxylation (B) Dehydrogenation (C) Acetylation (D) Oxidation
Last Answer : Answer : C
Description : Which of the following is not true of sulfonamides ? (a) They are primarily metabolized by acetylation (b) They are more likely to produce crystalluria in alkaline urine in which they are ... in the urinary tract (d) Used alone, they have become therapeutically unreliable for serious infections
Last Answer : Ans: B
Last Answer : (C) Acetylation
Description : The following is true of sulfonamides except: A. They are more likely to produce crystalluria in alkaline urine in which they are less soluble B. They are primarily metabolized by acetylation ... in the urinary tract D. Used alone, they have become therapeutically unreliable for serious infections
Last Answer : A. They are more likely to produce crystalluria in alkaline urine in which they are less soluble
Description : The following drug metabolizing reaction is entirely nonmicrosomal: A. Glucuronide conjugation B. Acetylation C. Oxidation D. Reduction
Last Answer : B. Acetylation
Description : The most commonly occurring conjugation reaction for drugs and their metabolites is: A. Glucuronidation B. Acetylation C. Methylation D. Glutathione conjugation
Last Answer : A. Glucuronidation
Description : What is ocean acidification?
Last Answer : Ocean acidification is the decrease in the pH of the Earth's oceans due to the absorption of carbon dioxide from the atmosphere, which can have harmful effects on marine life and ecosystems, and is an important concept in environmental science and climate change.
Last Answer : Ocean acidification is the ongoing decrease in the pH of the Earth's oceans, primarily due to the absorption of carbon dioxide from the atmosphere, and is an important concept in marine science and environmental policy.
Last Answer : Ocean acidification is the process by which the pH of the Earth's oceans decreases due to the absorption of carbon dioxide from the atmosphere, and is an important concept in marine biology and environmental science.
Description : Assertion : Dark acidification of cytoplasm occurs in CAM plants. Reaon : Orgnaic acids are decarboxylated during night.
Last Answer : Assertion : Dark acidification of cytoplasm occurs in CAM plants. Reaon : Orgnaic acids are ... . If both Assertion and Reason are false.
Description : Phenol on treatment with `CO_(2)` in the presence of `NaOH` followed by acidification produces compound X as the major product. X on treatment with `(
Last Answer : Phenol on treatment with `CO_(2)` in the presence of `NaOH` followed by acidification produces compound X as the ... `H_(2)SO_(4)` produces B. C. D.
Description : Which of the following reactants on reaction with conc. NaOH followed by acidification gives following lactone as the product?
Last Answer : Which of the following reactants on reaction with conc. NaOH followed by acidification gives following lactone as the product? A. B. C. D.