Carboxylic Acids
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Transcript of Carboxylic Acids
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1Correct order of acidity of carboxylic acids, alcohol, phenol, aldehydes, ketone, alkanes, alkenes, alkynes, amides, amines, ethers and esters,acid chlorides is
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2Which carboxylic acid gives Tollen's test positive?( )Formic acid
( )Acetic acid
( )Both formic and acetic acid
( )None of these
Single Answer
3Maleic acid is
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4Malic acid is
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5Correct order of acid strength of a)HCOOH, b)(CH3)3CCOOH, c)CH3CCOOH, d)FCH2COOH, e)ClCH2COOH, f)BrCH2COOH is (in descending order)
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6Which of the following statement is incorrect?( )Larger the Ka or lower the pKa value of the acid, stronger will be the acid
( )Electron releasing groups at p-position of aromatic acid increase the acidity
( )Formic acid is stronger than acetic acid
( )Benzoic acid is stroner than acetic acid
Single Answer
7Match the correct IUPAC names of the following:
Match
8Number of carbon atoms in nonadecylic acid is
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9Number of carbon atoms in montanic acid is
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10Number of carbon atoms in lauric acid is
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11Number of carbon atoms in psyllic acid is
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12Which one of the following is the weakest acid?( )CCl3COOH
( )CH3COOH
( )ClCH2COOH
( )CHCl2COOH
Single Answer
13CH3COONa and CH3-COCl react to give( )Acetic acid
( )Aceteic anhydride
( )Acetone
( )Sodium formate
Single Answer
14Which one of the following is weaker than benzoic acid?( )P-methyl benzoic acid
( )P-chloro benzoic acid
( )P-sulphonyl benzoic acid
( )P-nitro benzoic acid
Single Answer
15Which one of the following has maximum acid strength?( )M-nitro benzoic acid
( )O-nitro benzoic acid
( )P-nitro benzoic acid
( )P-nitro phenol
Single Answer
16Which one of the following does not have a carboxylic acid group?( )Ethanoic acid
( )Aspirin
( )Benzoic acid
( )Picric acid
Single Answer
17The main product obtained when acetic acid reacts with PCl5 is( )CH3COCl
( )CH3Cl
( )CCl3CHO
( )CH3OH
Single Answer
18Acetamide on hydrolysis gives
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19Acetic acid is produced by the oxidation of acetaldyhyde (50-70g) in presence of manganous acetate. The later is used( )None of these
( )As catalyst
( )To increase the yield of acetic acid
( )To prevent the formation of peracetic acid
Single Answer
20Carboxylic acids have boiling point higher than alcohols because( )Have higher molecular weights
( )None of these
( )They possess extensive H-bonds
( )Alcohols are non polar
Single Answer
21Acetic anhydride on reaction with ammonia produces
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22Esterification of carboxylic acids completes in ____ steps.( )3
( )2
( )1
( )4
Single Answer
23Chlorination of carboxylic acid in presence of phosphorous produces
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24Which of the following has highest melting point?( )Ethanol
( )Propionic acid
( )Acetic acid
( )Formic acid
Single Answer
25Which one of the following is not a fatty acid?( )Butyric acid
( )Phthalic acid
( )Propionic acid
( )Palmitic acid
Single Answer
26Urea is( )As ester
( )An amino acid
( )An amide
( )A carboxylic acid
Single Answer
27Which one of the following is the strongest acid?( )O-hydroxy benzoic acid
( )Parahydroxy benzoic acid
( )Benzoic acid
( )M-hydroxy benzoic acid
Single Answer
28Carboxylic acid on reaction with LiAlH4 in presence of ether produces
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29Ester on hydrolysis produce
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30Acetic acid is prepared on large scale from( )Acetylene
( )Phenol
( )Acetyl chloride
( )Acetone
Single Answer
31Which one of the following acids is the strongest?( )Acetic acid
( )Formic acid
( )Chloroacetic acid
( )Dichloroacetic acid
Single Answer
32Carboxylic acids can be prepared by various methods. Which of the following mrthods is not suitable for making carboxylic acid?( )Oxidation of primary alcohols
( )Carbonation of grignard reagent
( )Hydrolysis of nitriles
( )Hydrolysis of p-amines
Single Answer
33Oxidic acid is( )An aromatic dicarboxylic acid
( )An aliphatic dicarboxylic acid
( )An aromatic mono carboxylic acid
( )An aliphatic mono carboxylic acid
Single Answer
34Monocarboxylic acids exist as dimmer because of( )Cohesive forces
( )Van der waal forces
( )Dipole-dipole attraction
( )Hydrogen bonding
Single Answer
35Ethanoic acid reacts with PCl5 to give ethanoyl chloride, HCl and a third compound. What is the compound( )H3PO3
( )COCl2
( )POCl3
( )SO2
Single Answer
36SOCl2 changes acetic acid to ethanoyl chloride and the third product is( )POCl3
( )COCl2
( )SO2
( )H3PO3
Single Answer
37Which of the following posseses odour like pineapple?( )Amylacetate
( )Amylbutyrate
( )Ethylbutyrate
( )Benzylacetate
Single Answer
38In esterification process, H2SO4 acts as
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39Essential amino acids are those amino acids which( )Beta-amino acids
( )Alpha-amino acids
( )Body can not synthesize
( )Body can synthesize
Single Answer
40Aspartic acid is( )Neutral amino acid
( )Basic amino acid
( )None of these
( )Acidic amino acid
Single Answer
41Acetic acid is manufactured by( )Esterification
( )Ozonolysis
( )Distillation
( )Fermentation
Single Answer
42Which acid is used in the manufacture of synthetic fibre?( )Carbonic acid
( )Acetic acid
( )Phthalic acid
( )Formic acid
Single Answer
43Which of the following derivative can not be prepared directly from acetic acid?( )Acetic anhydride
( )Acetyl chloride
( )Ethyl acetate
( )Acetamide
Single Answer
44The solution of which acid is used for seasoning of food?( )Benzoic acid
( )Nutanoic acid
( )Formic acid
( )Acetic acid
Single Answer
45An aqueous solution of an organic compound reacts with sodium carbonate to produce carbon dioxide gas. Which one of the following could be the organic compound?( )CH3COOC2H5
( )CH2=CH-CH3
( )CH3-CH2-COOH
( )CH3-CHO
Single Answer
46Which of the following is not a fatty acid?( )Propanoic acid
( )Acetic acid
( )Butanoic acid
( )Phthalic acid
Single Answer
47Acetamide is prepared by( )Heating ammonium acetate
( )Heating methyl canidey
( )Heating ethyl acetate
( )The hydrolysis of methyl cyanide
Single Answer
48Reaction of alcohol with carboxylic acid is known as
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49Acetic acid is characterized as a weak acid because it( )Has less density
( )Is less volatile
( )Is less viscous
( )Has less dissociation
Single Answer
50When acetic acid and ethanol react together, an ester is formed which is called
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51When carboxylic acid is reacted with soda lime and alkali, it produces carbon dioxide and simple hydrocarbon, which of the following is that?( )Alkene
( )Alkyne
( )None of these
( )Alkane
Single Answer
52Ethyl acetate when allowed to react with water in acidic media, it produces acetic acid and ethyl alcohol. This process is also known as( )Salvation
( )Hydration
( )Hydrolysis
( )Solvolysis
Single Answer
53Which of the following is used as essence of orange?( )Octyl acetate
( )Isoamyl acetate
( )Methyl butyrate
( )Isoamyl valerate
Single Answer
54The artificial smell of banana is produced in many articles by using( )Amyl acetate
( )Octyl acetate
( )Isoamyl valerate
( )Methyl butyrate
Single Answer
55The acid present in stings of bees and wasps is
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56Acetic acid is weak acid because it( )Forms only a few hydrogen ions in solution
( )Will react only with very reactive metals
( )Does not readily combine with bases
( )Is not verry soluble in water
Single Answer
57Which of the following statement about acetic anhydride is incorrect?( )It reacts with ammonia to give acetamide
( )It is immiscible with water but is hydrolysed to give acetic acid
( )It is a strong acid
( )It is prepared by the action of acetyl chloride on the sodium salt of acetic acid
Single Answer
58Optical activity is possible in( )Oxalic acid
( )Tartaric acid
( )Acetic acid
( )Formic acid
Single Answer
59Which one of the following has both hydroxyl and carboxylic acid group?( )Phthalic acid
( )Phenol
( )Picric acid
( )Salicylic acid
Single Answer
60The OH group present in acids may be replaced by Cl atom on treatment with( )PCl5
( )SOCl2
( )Both of these
( )None of these
Single Answer
61If large number of amino acids (100-1000) are joined by peptide bonds, the resulting product is called( )Dipeptide
( )Tripeptide
( )None of these
( )Polypeptide
Single Answer
62A peptide having molecular mass upto 10,000 is called( )Dipeptide
( )Protein
( )Polypeptide
( )Vitamin
Single Answer
63Calcium acetate when dry distilled gives
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64Which of the following alcohols can not be produced by treatment of aldehydes or ketones with NaBH4 or LiAlH4( )1-propanol
( )2-propanol
( )Ethanol
( )2-methyl 2-propanol
Single Answer
65In public urinals, we observe some nascent smell. This smell is due to( )Formation of sulphonic acid by urea of urine
( )Hydrolysis of urea of urine by urease of atmosphere into NH3 and CO2
( )Reaction of CO2 of atmosphere with urea mononitrate in urine
( )Hydrogen present in air reacts with nitrogen forming NH3
Single Answer
66Acetic anhydride is obtained from acetyl chloride by the reaction of( )CH3COONa
( )CH3COCH3
( )P2O5
( )H2SO4
Single Answer
67Toluene can be oxidized to benzoic acid by( )KMnO4 (alk)
( )K2Cr2O7 (acidic)
( )Both
( )None
Single Answer
68Heating mixture of sodium benzoate and soda lime ives
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69Sulphonation of benzoic acid produces mainly( )O and p-sulphobenzoic acid
( )M-sulphobenzoic acid
( )O-sulphobenzoic acid
( )P-sulphobenzoic acid
Single Answer
70Formic acid is obtained when( )Calcium formate is heated with calcium acetate
( )Acetaldehyde is oxidized with K2Cr2O7 and H2SO4
( )Calcium acetate is heated with conc.H2SO4
( )Glycerol is heated with oxalic acid
Single Answer
71Given below are some statements concerning formic acid, which of theem is true?( )It is weaker acid than acetic acid
( )It is an oxidizing agent
( )It is a reducing agent
( )When its calcium salt is heated, it forms a ketone
Single Answer
72Two moles of acetic acid are heated with P2O5, the product formed is( )2 moles of ethyl alcohol
( )Acetic anhydride
( )Formic anhydride
( )2 moles of methyl cyanide
Single Answer
73Which will not give acetamide on reaction with ammonia?( )Acetic anhydride
( )Acetyl chloride
( )Methyl propionate
( )Acetic acid
Single Answer
74When acetamide is hydrolysed by boiling with acid the product obtained is( )Acetaldehyde
( )Ethyl amine
( )Acetic acid
( )Ethyl alcohol
Single Answer
75Acetic acid is obtained when( )Glycerol is heated with sulphuric acid
( )Calcium acetate is distilled in the presence of calcium formate
( )Methyl alcohol is oxidized with potassium permanganate
( )Acetaldehyde is oxidized wiith potassium dichromate and sulphuric acid
Single Answer
76Acetic acid is manufactured by the fermentation of( )Ethanal
( )Ethanol
( )Methanol
( )Methanal
Single Answer
77Of the following four reaction, formic acid and acetic acid differ in which respect?( )Formation of ester with alcohol
( )Blue litmus reaction
( )Reduction of fehling solution
( )Replacement of hydrogen by sodium
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78Amides on treatment with Br2 and KOH are converted into amines, the reaction is known as( )Hoffmann's broamide reaction
( )Hoffmann's methylation
( )H.V.Z reaction
( )Gabriel phthalimide reaction
Single Answer
79When acetamide reacts with Br2 and caustic soda, then we get( )Acetic acid
( )Bromoacetic acid
( )Methyl amine
( )Ethyl amine
Single Answer
80Aspirin is( )Benzoic acid
( )Phenyl salicylic acid
( )Salicylic acid
( )Acetyl salicylic acid
Single Answer
81Which of the following does give violet colour with neutral ferric chloride?( )Salicylic acid
( )Benzoic acid
( )Formine acid
( )Acetic acid
Single Answer
82A nucleophilic reagent will readily attack( )Ethylene
( )Ethyne
( )Ethanoyl chloride
( )Ethanal
Single Answer
83The reaction of acetaldehyde with HCN followed by hydrolysis gives a product which exhibits( )Metamerism
( )Enantiomerism
( )Tautomerism
( )Geometrical isomerism
Single Answer
84An organic compound having molecular formula C2H4O2 is( )Propionic acid
( )Oxalic acid
( )Formic acid
( )Acetic acid
Single Answer
85Weakest acid among following is( )Acetylene
( )Phenol
( )Water
( )Acetic acid
Single Answer
86Ethyl alcohol reacts with acetyl chloride to form( )Methyl acetate
( )Acetic acid
( )Ethyl acetate
( )Ethyl chloride
Single Answer
87Acetamide is( )Highly acidic
( )Highly basic
( )Amphoteric
( )Neutral
Single Answer
88Acetamide and NaOBr/OH- produce( )CH3CN
( )Ethanamine
( )Methanamine
( )NH3
Single Answer
89What is formed when oxalic acid is dehydrated by conc.H2SO4?( )C+CO2
( )CO2
( )CO + CO2
( )CO
Single Answer
90Correct order of acid stength of benzamide, aniline and cyclohexylamine is
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91Acyl halide is formed by reacting PCl5 with( )Alcohol
( )Both carboxylic acid as well as esters
( )Ester
( )Amide
Single Answer
92From the following values of dissociation constants of four acids which value represents the strongest acid?( )3*10^-4
( )2*10^-2
( )2*10^-4
( )0.02*10^-1
Single Answer
93Lactic acid on heating with dil.H2SO4 gives( )Formic acid
( )Propionic acid
( )Acrylic acid
( )Acetic acid
Single Answer
94A colourless liquid, at room temperature reacts with soda lime to form sodium salt of carboxylic acid and ammonia gas. The liquid is( )Formamide
( )Methyl ethanoate
( )Propanamide
( )Propanoic acid
Single Answer
95Alkaline hydrolysis of urea with dil.NaOH gives( )Nitrogen and sodium carbonate
( )Ammonia and sodium carbonate
( )Ammonia and cyanuric acid
( )Biuret and ammonia
Single Answer
96Which of the following reaction produces R-CO-Ar?( )COCl + RMgX
( )ArCOCl + H-Ar in presence of AlCl3
( )R + CrO3
( )RCOCl + H-Ar in presence of AlCl3
Single Answer
97In presence of aluminium ethoxide, aldehydes get converted into esters. The reaction is known as( )Aldol condensation
( )Tischenko reaction
( )Beckmann's rearrangement reaction
( )Schmidt react
Single Answer
98The acid showing salt like character in aqueous solution is( )Acetic acid
( )Formic acid
( )Alpha-aminoacetic acid
( )Benzoic acid
Single Answer
99The order of decreasing ease of reaction with ammonia is( )Ethers, anhydrides, esters
( )Anhydrides, ethers, esters
( )Esters, ethers, anhydrides
( )Anhydride, esters, ethers
Single Answer
100Which of the following is the strongest acid?( )CF3COOH
( )CH3COOH
( )CCl3COOH
( )CBr3COOH
Single Answer
101If acetyl chloride is reduced in the presence of BaSO4 and Pd, then( )CH3CH2OH is formed
( )CH3COOH is formed
( )CH3COCH3 is formed
( )CH3CHO is formed
Single Answer
102Hydrolysis of trichloromethane with aqueous KOH gives( )Chloral
( )Potassium formate
( )Methanol
( )Acetylene
Single Answer
103Lower carboxylic acids are soluble in water due to( )Easy hydrolysis
( )Dissociation into ions
( )Low molecular weight
( )Hydrogen bonding
Single Answer
104Ethyl acetate reacts with CH3MgBr to form( )Tertiary alcohol
( )Primary alcohol
( )Secondary alcohol
( )Acid
Single Answer
105Sponification of ethyl benzoate with caustic soda( )Benzoic acid, sodium ethoxide
( )Benzyl alcohol, ethanoic acid
( )Sodium benzoate, ethanol
( )Phenol, ethanoic acid
Single Answer
106Which of the following compounds on boiling with KMnO4 (alk) and subsequent acidification will not give benzoic acid?( )Benzyl alcohol
( )Anisole
( )Acetophenone
( )Toluene
Single Answer
107Rosenmund's reduction of an acyl chloride gives( )An alcohol
( )An aldehyde
( )An hydrocarbon
( )An ester
Single Answer
108Which of the following reagent is used to distinguish between methanoic acid and ethanoic acid?( )Amm.silver nitrate solution
( )Sodium hydroxide solution
( )Sodium carbonate solution
( )Neutral ferric chloride
Single Answer
109Rearrangement of an oxime to an amide in the presence of strong acid is called( )Aldol condensation
( )Fries rearrangement
( )Beckman rearrangement
( )Curtius rearrangement
Single Answer
110What will happen if LiAlH4 l ethanoateis added to an ester?( )Two units of acid are obtained
( )Two units of alcohol are obtained
( )None of these
( )One unit of alcohol and one unit of acid is obtained
Single Answer
111When propanamide reacts with Br2 and NaOH, ___________________________ is formed.( )Propyl alcohol
( )Ethyl amine
( )Ethyl alcohol
( )Propyl amine
Single Answer
112HCOOH reacts with conc.H2SO4 to produce( )NO
( )CO
( )NO2
( )CO2
Single Answer
113Hydrolysis of an ester gives a carboxylic acid which on kolbe's electrolysis yields ethane, the ester is( )Methyl ethanoate
( )Ethyl methanoate
( )Propylamine
( )Ethylamine
Single Answer
114Lactic acid on oxidation by alkaline potassium permanganate gives( )Propionic acid
( )Pyruvic acid
( )Cinnamic acid
( )Tartaric acid
Single Answer
115Ethyl acetate is obtained when methyl magnesium iodide reacts with( )Ethyl chloroformate
( )Ethyl formate
( )Carbon dioxide
( )Acetyl chloride
Single Answer
116Carboxilic acids are more acidic than phenol and alcohol because of( )Formation of dimmers
( )Highly acidic hydrogen
( )Resonance stabilization of their conjugate base
( )Intermolecular hydrogen bonding
Single Answer