Description : Which of the following statements is false about sucrose? (a) It is also called table sugar. (b) It may be fermented by yeast to produce alcohol. (c) It reduces Fehling's solution. (d) It does not reduce Tollens' reagent.
Last Answer : It reduces Fehling's solution
Description : Which of the following compounds will react with Tollens' reagent to give metallic silver? (a) Formic acid (b) Ethyl alcohol (c) Acetic acid (d) Acetone
Last Answer : Formic acid
Description : Benzaldehyde does not react with (a) Tollens' reagent (b) Phenylhydrazine (c) Fehling's solution (d) NaHSO3
Last Answer : Fehling's solution
Description : Benzaldehyde can be distinguished from acetophenone by using : (a) Tollens' reagent (b) Lucas reagent (c) Fehling's reagent (d) All of these
Last Answer : Tollens' reagent
Description : The reagent that can be used to differentiate an aldose and a ketose is : (a) Bromine water (b) Fehling's solution (c) Tollens' reagent (d) None of these
Last Answer : Bromine water
Description : Acetaldehyde on treatment with Tollens' reagent gives a precipitate of (a) Ag (b) AgNO3 (c) Cu2O (d) None of these
Last Answer : Ag
Description : Which of the following reagents will react readily with both aldehydes and ketones? (a) Grignard reagent (b) Fehling's reagent (c) Tollens' reagent (d) Schiff's reagen
Last Answer : Grignard reagent
Description : 1-Butyne can be distinguished from 2-butyne by using (a) potassium permanganate (b) bromine in CCl4 (c) Tollens' reagent (d) chlorine in CCl4
Last Answer : chlorine in CCl4
Description : Ethylene and acetylene can be distinguished by using (a) Bromine in CCl4 (b) Tollens' reagent (b) Baeyer's reagent (d) Phenylhydrazine
Description : A hydrocarbon, C6H12, on ozonolysis gives only one product which does not give silver mirror with Tollens' reagent. The hydrocarbon is (a) 2,3-Dimethyl-2-butene (b) 2-Hexene (c) 2-Methyl-2-pentene (d) 3-Hexene
Last Answer : 2,3-Dimethyl-2-butene
Description : CH3CHO and C6H5CH2CHO can be distinguished chemically by (1) Fehling solution test (2) Benedict test (3) Iodoform test (4) Tollen’s reagent test
Last Answer : Iodoform test
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 : Which of the following would give a positive Tollen’s test? (a) α-D-glucopyranose (b) methyl β-D-glucopyranoside (c) sucrose (d) methyl α-D-ribofuranoside
Last Answer : α-D-glucopyranose
Description : In the conversion of wine to vinegar (a) Ethanol is oxidized to acetic acid (b) Ethanol is reduced to acetic acid (c) Methanol is oxidized to acetic acid (d) Methanol is reduced to acetic acid
Last Answer : Ethanol is oxidized to acetic acid
Description : In the United States, Grain alcohol is made: w) from coal x) by fermenting starches y) from methanol z) from vinegar e) by fermenting acetic acid
Last Answer : ANSWER: X -- BY FERMENTING STARCHES
Description : Which of the following would be most acidic? w) phenol x) methanol y) acetic acid z) methyl amine
Last Answer : ANSWER: C -- ACETIC ACID
Description : Which of the following compounds will give an iodoform test? (a) Benzoic acid (b) Ethanol (c) Benzyl chloride (d) Methanol
Last Answer : Ethanol
Description : Ethanol is used in methanol poisoning because it: A. Antagonises the actions of methanol B. Stimulates the metabolism of methanol and reduces its blood level C. Inhibits the metabolism of methanol and generation of toxic metabolite D. Replenishes the folate stores depleted by methano
Last Answer : C. Inhibits the metabolism of methanol and generation of toxic metabolite
Description : Which of the following compounds does not give a positive iodoform test : (a) Ethanol (b) Ethanal (c) Methanol (d) Propanone
Last Answer : Methanol
Description : Which of the following compounds is most acidic? (a) Formic acid (b) Ethanol (c) Acetic acid (d) Phenol
Description : Which of the following compounds is least acidic? (a) Formic acid (b) Ethanol (c) Acetic acid (d) Phenol
Description : Which of the following compounds will react with PCl5 least vigorously? (a) Ethanol (b) Acetic acid (c) Phenol (d) Benzoic acid
Last Answer : Phenol
Description : Which of the following compounds on treatment with NaHCO3 will liberate CO2? (a) Acetic acid (b) Ethylamine (c) Acetone (d) Ethyl alcohol
Last Answer : Acetic acid
Description : Which of the following compounds will give a positive test with Fehling's solution? (a) Formaldehyde (b) Acetone (c) Ethyl acetate (d) Acetic acid
Last Answer : Formaldehyde
Description : Which of the following compounds will dissolve in aqueous NaOH after undergoing reaction with Hinsberg reagent? (a) CH3CH2NH2 (b) (CH3CH2)2NH (c) (CH3CH2)3N (d) (CH3)3N
Last Answer : CH3CH2NH2
Description : Which of the following compounds will react fastest with Lucas reagent? (a) 1-propanol (b) 2-methyl-1-propanol (c) 2-propanol (d) 2-methyl-2-propanol
Last Answer : 2-methyl-2-propanol
Description : Which of the following compounds reacts slowest with Lucas reagent at room temperature? (a) 1-butanol (b) 2-propanol (c) 2-butanol (d) 2-methyl-2-propanol
Last Answer : 1-butanol
Description : The polymer obtained by the condensation of hexamethylene diamine and adipic acid is – (1) Nylon 66 (2) Terylene (3) Tollen's (4) Bakelite
Last Answer : (1) Nylon 66 Explanation: Polymers are very high molecular mass substances each molecule of which consists of very large number of simple structural units joined together though covalent bonds ... the repeating structural unit is derived from two monomer units - hexamethylenediamine and adipic acid.
Description : A compound gives a positive Tollens' test but negative Ninhydrin test. It is (a) a protein (b) an amino acid (c) a monosaccharide (d) pyridine
Last Answer : a monosaccharide
Description : The polymer obtained by the condensation of hexamethylene diamine and adipic acid is : (1) Nylon 66 (2) Terylene (3) Tollen’s (4) Bakelite
Last Answer : Nylon 66
Description : The first stable product of photosynthesis is – (1) Starch (2) Sucrose (3) Phosphoglyceric acid (4) Glucose
Last Answer : (3) Phosphoglyceric acid Explanation: The first product of photosynthesis is a three-carbon compound called phosphoglyceric acid and phosphoglyceraldehyde. Almost immediately, two of these join to ... photosynthesis not three-carbon but four-carbon compounds- oxalacetic, malic, and aspartic acids.
Description : The first stable product of photosynthesis is (1) Starch (2) Sucrose (3) Phosphoglyceric acid (4) Glucose
Last Answer : Phosphoglyceric acid
Description : When yeast ferments glucose, the products obtained are (a) ethanol and CO2 (b) methanol and CO2 (c) ethanol and water (d) water and CO2.
Last Answer : a) ethanol and CO2
Description : The major component of honey is - (1) glucose (2) sucrose (3) maltose (4) fructose
Last Answer : (4) fructose Explanation: Honey is a supersaturated sugar solution with approximately 17.1 percent water. Fructose is the predominant sugar at 38.5 percent, followed by glucose at 31 percent.
Description : Which of the following carbohydrates will not give a red precipitate of Cu2O when heated with Benedict's solution? (a) Maltose (b) Glucose (c) Sucrose (d) Fructose
Last Answer : Sucrose
Description : Which of the following carbohydrates is not a reducing sugar? (a) Glucose (b) Sucrose (c) Fructose (d) Lactose
Description : The sugar that yields only glucose on hydrolysis is (a) Lactose (b) Sucrose (c) Maltose (d) Fructose
Last Answer : Maltose
Description : Which of the following carbohydrates is sweeter than sucrose? (a) Glucose (b) Fructose (c) Lactose (d) None of these
Last Answer : Fructose
Description : Common table sugar is (a) Glucose (b) Sucrose (c) Fructose (d) Maltose
Description : The principal sugar in blood is (a) Fructose (b) Glucose (c) Sucrose (d) Galactose
Last Answer : Glucose
Description : Which of the following is not a monosaccharide? (a) Ribose (b) Fructose (c) Sucrose (d) Glucose
Description : Which of the following is true about sucrose? (a) It hydrolyzes to fructose and glucose. (b) It is a reducing sugar. (c) It is a monosaccharide. (d) It undergoes mutarotation in water.
Last Answer : It hydrolyzes to fructose and glucose.
Description : Which compound is a monosaccharide? w) maltose x) sucrose y) glucose z) glycogen
Last Answer : ANSWER: Y -- GLUCOSE
Description : Which of the following yields a substance other than glucose on degradation by water? w) Cellulose x) Glycogen y) Sucrose z) Maltose
Last Answer : ANSWER: Y -- SUCROSE
Description : Glucose is one of the simple sugars in sucrose. Name the other.
Last Answer : ANSWER: FRUCTOSE
Description : How many of the following compounds would give turbidity with lucas reagent without heating (1) Benzyl alcohol (2) Allyl alcohol (3) Cyclohexanol (4)
Last Answer : How many of the following compounds would give turbidity with lucas reagent without heating (1) ... methyl carbionol (9) P-Nitro benzyl alcohol
Description : What are the signals of the functional group present in methanol acid ?
Last Answer : The active group present in methanol acid is the alcoholic hydroxyl group ( -OH) .
Description : The reaction of ethanal with one equivalent of methanol and a trace of an acid will give (a) Acetal (b) Hemiacetal (c) Ketal (d) Hemiketa
Last Answer : Hemiacetal
Description : Which of the following statements is NOT correct : (a) Tollens' test is given by both aliphatic and aromatic aldehydes. (b) Fehling's test is given by aliphatic aldehydes. It is not given ... given by methyl ketones and acetaldehydes. (d) Lucas test is given by both aliphatic and aromatic aldehydes
Last Answer : Lucas test is given by both aliphatic and aromatic aldehydes
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