Lucas test is used to determine the type of (a) alcohols (b) acids (c) amines (d) carbohydrates

Lucas test is used to determine the type of
(a) alcohols
(b) acids
(c) amines
(d) carbohydrates
by

1 Answer

Answer :

alcohols
by

Related questions

Lucas test is used to make distinction between `1^(@), 2^(@)` and `3^(@)` alcohols. This do not show that

Description : Lucas test is used to make distinction between `1^(@), 2^(@)` and `3^(@)` alcohols. This do not show that

Last Answer : Lucas test is used to make distinction between `1^(@), 2^(@)` and `3^(@)` alcohols. ... those giving blue or white colour during Victor Mayor test.

There are three alcohols x, y, z which have 2, 1 and 0 alpha hydrogen atoms(s) respectively. Which does not give Lucas Test immediately

Description : There are three alcohols x, y, z which have 2, 1 and 0 alpha hydrogen atoms(s) respectively. Which does not give Lucas Test immediately

Last Answer : There are three alcohols x, y, z which have 2, 1 and 0 alpha hydrogen atoms(s) respectively. Which does ... y C. z D. all the three do not give test

Why are amines always less acidic than comparable alcohols?

Description : Why are amines always less acidic than comparable alcohols?

Last Answer : Ans.--- Amines are less acidic than alcohols because of oxygen higher electronegative & smaller size. Therefore O-H breakes easily than N-H bond. 

Aliphatic primary amines react with cold nitrous acid to form (a) Alcohols (b) Diazonium salts (c) Nitriles (d) Nitroalkanes

Description : Aliphatic primary amines react with cold nitrous acid to form (a) Alcohols (b) Diazonium salts (c) Nitriles (d) Nitroalkanes

Last Answer : Alcohols

Amines are generally classified as (a) Weak acids (b) Strong acids (c) Weak bases (d) Strong bases

Description : Amines are generally classified as (a) Weak acids (b) Strong acids (c) Weak bases (d) Strong bases

Last Answer : Weak bases

Which of the following statements is false about primary amines? (a) They can be prepared by reduction of nitriles with LiAlH4. (b) They do not form salts with acids(c) They react with ice-cold nitrous acid to form nitrogen gas.(d) They are basic and soluble in water

Description : Which of the following statements is false about primary amines? (a) They can be prepared by reduction of nitriles with LiAlH4. (b) They do not form salts with acids (c) They react with ice-cold nitrous acid to form nitrogen gas. (d) They are basic and soluble in water

Last Answer : They do not form salts with acids

Aspartame is the name of a product used by diabetic patients as a sweetening agent. It belongs to the class of — (1) Carbohydrates (2) Peptides (3) Polyhydric alcohols (4) Alkaloids

Description : Aspartame is the name of a product used by diabetic patients as a sweetening agent. It belongs to the class of — (1) Carbohydrates (2) Peptides (3) Polyhydric alcohols (4) Alkaloids

Last Answer : (2) Peptides Explanation: Aspartame is an artificial, nonsaccharide sweetener used as a sugar substitute in some foods and beverages. It is a methyl ester of the aspartic acid/phenylalanine ... more severe conditions, the peptide bonds are also hydrolyzed, resulting in the free amino acids.

Aspartame is the name of a product used by diabetic patients as a sweetening agent. It belongs to the class of— (1) Carbohydrates (2) Peptides (3) Polyhydric alcohols (4) Alkaloids

Description : Aspartame is the name of a product used by diabetic patients as a sweetening agent. It belongs to the class of— (1) Carbohydrates (2) Peptides (3) Polyhydric alcohols (4) Alkaloids

Last Answer : Peptides

Upon hydrolysis, proteins give (a) Amino acids (b) Hydroxy acids (c) Fatty acids (d) Alcohols

Description : Upon hydrolysis, proteins give (a) Amino acids (b) Hydroxy acids (c) Fatty acids (d) Alcohols

Last Answer : Amino acids

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

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

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 oxygen (c) the acidity of α-hydrogens of carboxylic acids (d) the resonance stability associated with the carboxylate ion

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

Aldehydes undergo oxidation with KMnO4/H+ to give (a) Alcohols (b) Acetals (c) Ketones (d) Acids

Description : Aldehydes undergo oxidation with KMnO4/H+ to give (a) Alcohols (b) Acetals (c) Ketones (d) Acids

Last Answer : Acids

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 by aromatic aldehydes. (c) Iodoform test is given by methyl ketones and acetaldehydes. (d) Lucas test is given by both aliphatic and aromatic aldehydes

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

Carbylamine test is given by (a) Primary amines (b) Secondary amines (c) Tertiary amines (d) None of these

Description : Carbylamine test is given by (a) Primary amines (b) Secondary amines (c) Tertiary amines (d) None of these

Last Answer : Primary amines

Prostaglandins are (A) C2 unsaturated acids (B) C27 saturated alcohols (C) C20 saturated acids (D) C27 saturated alcohols

Description : Prostaglandins are (A) C2 unsaturated acids (B) C27 saturated alcohols (C) C20 saturated acids (D) C27 saturated alcohols

Last Answer : Answer : A

Esters of fatty acids with higher alcohols other than glycerol are said to be (A) Waxes (B) Fats (C) Both (A) and (B) (D) None of these

Description : Esters of fatty acids with higher alcohols other than glycerol are said to be (A) Waxes (B) Fats (C) Both (A) and (B) (D) None of these

Last Answer : Answer : A

Pick out the wrong statement. (A) Linear polymers are formed from bifunctional groups only and are normally thermoplastic (B) Cross-linked branched chain polymers are either elastometric or thermosetting (C) Branching in case of cross-linked polymers caused by small amount of impurities in bifunctional monomer formulation reduces its solubility and increases the softening point (D) Dibasic acids reacts with dihydric alcohols to give polyesters using addition polymerisation reaction

Description : Pick out the wrong statement. (A) Linear polymers are formed from bifunctional groups only and are normally thermoplastic (B) Cross-linked branched chain polymers are either elastometric or ... (D) Dibasic acids reacts with dihydric alcohols to give polyesters using addition polymerisation reaction

Last Answer : D) Dibasic acids reacts with dihydric alcohols to give polyesters using addition polymerisation reaction

Fatty acids react with trihydric alcohols to form

Description : Fatty acids react with trihydric alcohols to form

Last Answer : glycerides.

Oil is a/an (A) Mixture of glycerides (B) Mixture of glycerides of fatty acids (C) Solid at normal temperature (D) Ester of alcohols other than glycerine

Description : Oil is a/an (A) Mixture of glycerides (B) Mixture of glycerides of fatty acids (C) Solid at normal temperature (D) Ester of alcohols other than glycerine

Last Answer : (B) Mixture of glycerides of fatty acids

Wax is a (A) Mixture of glycerides (B) Mixture of esters of polyhydric alcohols excepting glycerine (C) Liquid at room temperature (D) Mixture of glycerides of fatty acids

Description : Wax is a (A) Mixture of glycerides (B) Mixture of esters of polyhydric alcohols excepting glycerine (C) Liquid at room temperature (D) Mixture of glycerides of fatty acids

Last Answer : (B) Mixture of esters of polyhydric alcohols excepting glycerine

Foaming is caused by the formation of ___________ a) Acids b) Alcohols c) Oils and alkalis d) Ketones

Description : Foaming is caused by the formation of ___________ a) Acids b) Alcohols c) Oils and alkalis d) Ketones

Last Answer : c) Oils and alkalis

Cholesterol, testosterone, and estrogen are all examples of: a) proteins b) steroids c) nucleic acids d) alcohols

Description : Cholesterol, testosterone, and estrogen are all examples of: a) proteins b) steroids c) nucleic acids d) alcohols

Last Answer : ANSWER: B -- STEROIDS 

. Sodium or potassium salts of fatty acids are called (a) Proteins (b) Terpenes (c) Carbohydrates (d) Soaps

Description : . Sodium or potassium salts of fatty acids are called (a) Proteins (b) Terpenes (c) Carbohydrates (d) Soaps

Last Answer : Soaps

Nutrasweet, the artificial sweetener, contains molecules in which of the following groups? w) carbohydrates x) lipids y) amino acids z) nucleic acids

Description : Nutrasweet, the artificial sweetener, contains molecules in which of the following groups? w) carbohydrates x) lipids y) amino acids z) nucleic acids

Last Answer : ANSWER: C--AMINO ACIDS 

In what category may LIPASE (pron: lie-pase) be placed w) carbohydrates x) lipids y) enzymes z) nucleic acids

Description : In what category may LIPASE (pron: lie-pase) be placed w) carbohydrates x) lipids y) enzymes z) nucleic acids

Last Answer : ANSWER: C--ENZYMES

In which of the following class of substances would WAX be found? w) carbohydrates x) lipids y) proteins z) nucleic acids

Description : In which of the following class of substances would WAX be found? w) carbohydrates x) lipids y) proteins z) nucleic acids

Last Answer : ANSWER: LIPIDS

Which of the following choices are considered to be polymers of amino acids? Are they: w) nucleotides x) carbohydrates y) lipids z) proteins

Description : Which of the following choices are considered to be polymers of amino acids? Are they: w) nucleotides x) carbohydrates y) lipids z) proteins

Last Answer : ANSWER: Z -- PROTEINS 

What is Lucas Reagent ?

Description : What is Lucas Reagent ?

Last Answer : : A mixture of concentrated HCl and insoluble ZnCl2 is called Lucas reagent.

Benzaldehyde can be distinguished from acetophenone by using : (a) Tollens' reagent (b) Lucas reagent (c) Fehling's reagent (d) All of these

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

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

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

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

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

The compound which reacts most readily with Lucas reagent is (a) CH3CH2Cl (b) (CH3)2CHOH (c) CH3CH2OH (d) (CH3)3COH

Description : The compound which reacts most readily with Lucas reagent is (a) CH3CH2Cl (b) (CH3)2CHOH (c) CH3CH2OH (d) (CH3)3COH

Last Answer : (CH3)3COH

Lucas reagents is (a) HCl/NaNO2 (b) H2/Pd (c) HCl/ZnCl2 (d) H2/Pd/BaSO4

Description : Lucas reagents is (a) HCl/NaNO2 (b) H2/Pd (c) HCl/ZnCl2 (d) H2/Pd/BaSO4

Last Answer : HCl/ZnCl2

Chemically fats and oils are: (1) Triesters (2) Amines (3) Aldehydes (4) Ketons

Description : Chemically fats and oils are: (1) Triesters (2) Amines (3) Aldehydes (4) Ketons

Last Answer : (1) Triesters Explanation: Fats and oils are called triglycerides (or triacylcylgerols) because they are esters composed of three fatty acid units joined to glycerol, a trihydroxy alcohol. Fats and oils are composed of molecules known as triglycerides, which are esters.

Aromatic primary amines are not prepared by gabrial phthalimide synthesis. Why?

Description : Aromatic primary amines are not prepared by gabrial phthalimide synthesis. Why?

Last Answer : Ans:- Because aryl halides donot undergo nucleophilic substitution reaction. 

Why tert. Amines donot undergo acylation reaction ?

Description : Why tert. Amines donot undergo acylation reaction ?

Last Answer : Ans.-- Tert. Amines donot undergo acylation reaction because they donot have Nattached to H- atom. 

Give reasons:--- a. Primary amines are more basic than ammonia. b . Sec. amines are more basic than pr.amines.

Description : Give reasons:--- a. Primary amines are more basic than ammonia. b . Sec. amines are more basic than pr.amines.

Last Answer : Ans— a. In pr. Amines, alkyl group increases electron density on the N-atom making it more basic than ammo b. In sec. amine, there are two alkyl groups increase electron density on N-atom more than N-atom in pr. amines in which there is one alkyl group. 

Can tertiary amines undergo acetylation reactions ? Explain.

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.

The diazonium salts are the reaction products of the reaction of nitrous acid with (a) primary aliphatic amines (b) primary aromatic amines (c) secondary aliphatic amines (d) secondary aromatic amines

Description : The diazonium salts are the reaction products of the reaction of nitrous acid with (a) primary aliphatic amines (b) primary aromatic amines (c) secondary aliphatic amines (d) secondary aromatic amines

Last Answer : primary aromatic amines

When ammonia is added to an alkyl halide, in the presence of base : (a) primary amines form (b) amides form (c) nitrated alkyl halides form (d) quaternary ammonium salts form

Description : When ammonia is added to an alkyl halide, in the presence of base : (a) primary amines form (b) amides form (c) nitrated alkyl halides form (d) quaternary ammonium salts form

Last Answer : primary amines form

Which of the following amines react with nitrous acid to form nitrosoamine? (a) Ethylamine (b) Triethylamine (c) Diethylamine (d) Isopropylamine

Description : Which of the following amines react with nitrous acid to form nitrosoamine? (a) Ethylamine (b) Triethylamine (c) Diethylamine (d) Isopropylamine

Last Answer : Diethylamine

Alkyl halides react with ammonia in the presence of base to form : (a) primary amines(b) nitrated alkyl halides(c) amides(d) quaternary ammonium salts

Description : Alkyl halides react with ammonia in the presence of base to form : (a) primary amines (b) nitrated alkyl halides (c) amides (d) quaternary ammonium salts

Last Answer : primary amines

Which of the following statements is false about secondary amines? (a) They react with chloroform and NaOH to form isocyanides. (b) They can be prepared by reduction of isocyanides. (c) They react with acid chlorides to give substituted amides. (d) They react with ice-cold nitrous acid to give nitrosamine (yellow oil)

Description : Which of the following statements is false about secondary amines? (a) They react with chloroform and NaOH to form isocyanides. (b) They can be prepared by reduction of isocyanides. (c) They react ... give substituted amides. (d) They react with ice-cold nitrous acid to give nitrosamine (yellow oil)

Last Answer : They react with chloroform and NaOH to form isocyanides.

Selectins are proteins that can recognise specific (A) Carbohydrates (B) Lipids (C) Amino acids (D) Nucleotides

Description : Selectins are proteins that can recognise specific (A) Carbohydrates (B) Lipids (C) Amino acids (D) Nucleotides

Last Answer : Answer : A

Fatty acids can not be converted into carbohydrates in the body, as the following reaction is not possible: (A) Conversion of glucose-6-phosphate into glucose (B) Fructose 1, 6 diphosphate to fructose-6- phosphate (C) Transformation of acetyl CoA to pyruvate (D) Formation of acetyl CoA from fatty acids

Description : Fatty acids can not be converted into carbohydrates in the body, as the following reaction is not possible: (A) Conversion of glucose-6-phosphate into glucose (B) Fructose 1, 6 diphosphate to ... phosphate (C) Transformation of acetyl CoA to pyruvate (D) Formation of acetyl CoA from fatty acids

Last Answer : Answer : C

Maximum energy produced by (A) Fats (B) Carbohydrates (C) Proteins (D) Nucleic acids

Description : Maximum energy produced by (A) Fats (B) Carbohydrates (C) Proteins (D) Nucleic acids

Last Answer : Answer : A

Degradation of proteins to amino acids, glucose from carbohydrates and fatty acids from lipids is known as (A) Anabolism (B) Metabolism (C) Catabolism (D) Cretinism

Description : Degradation of proteins to amino acids, glucose from carbohydrates and fatty acids from lipids is known as (A) Anabolism (B) Metabolism (C) Catabolism (D) Cretinism

Last Answer : Answer : C

Egg is poor in (A) Essential amino acids (B) Carbohydrates (C) Avidin (D) Biotin

Description : Egg is poor in (A) Essential amino acids (B) Carbohydrates (C) Avidin (D) Biotin

Last Answer : Answer : B

Fatty acids cannot be converted into carbohydrates in the body as the following reaction is not possible. (A) Conversion of glucose-6-phosphate into glucose (B) Fructose 1,6-bisphosphate to fructose-6- phosphate (C) Transformation of acetyl CoA to pyruvate (D) Formation of acetyl CoA from fatty acids

Description : Fatty acids cannot be converted into carbohydrates in the body as the following reaction is not possible. (A) Conversion of glucose-6-phosphate into glucose (B) Fructose 1,6-bisphosphate to fructose- ... (C) Transformation of acetyl CoA to pyruvate (D) Formation of acetyl CoA from fatty acids

Last Answer : C

Glucose will be converted into fatty acids if the diet has excess of (A) Carbohydrates (B) Proteins (C) Fat (D) Vitamins

Description : Glucose will be converted into fatty acids if the diet has excess of (A) Carbohydrates (B) Proteins (C) Fat (D) Vitamins

Last Answer : A