Carboxylic Acids
Short Description
Multiple Choice Questions on Carboxylic acids, preparation and properties...
Description
No
Questions
1
Correct 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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2
3
Which carboxylic acid gives Tollen's test positive? ( )
Formic acid
( )
Acetic acid
( )
Both formic and acetic acid
( )
None of these
Maleic acid is
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4
Malic acid is
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5
Correct 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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6
Which 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
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7
Match the correct IUPAC names of the following:
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8
Number of carbon atoms in nonadecylic acid is
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9
Number of carbon atoms in montanic acid is
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10
Number of carbon atoms in lauric acid is
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11
Number of carbon atoms in psyllic acid is
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12
Which one of the following is the weakest acid?
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17
( )
CCl3COOH
( )
CH3COOH
( )
ClCH2COOH
( )
CHCl2COOH
CH3COONa and CH3-COCl react to give ( )
Acetic acid
( )
Aceteic anhydride
( )
Acetone
( )
Sodium formate
Which 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
Which one of the following has maximum acid strength? ( )
M-nitro benzoic acid
( )
O-nitro benzoic acid
( )
P-nitro benzoic acid
( )
P-nitro phenol
Which one of the following does not have a carboxylic acid group? ( )
Ethanoic acid
( )
Aspirin
( )
Benzoic acid
( )
Picric acid
The main product obtained when acetic acid reacts with PCl5 is ( )
CH3COCl
( )
CH3Cl
( )
CCl3CHO
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CH3OH
Acetamide on hydrolysis gives
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20
21
Acetic 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
Carboxylic acids have boiling point higher than alcohols because ( )
Have higher molecular weights
( )
None of these
( )
They possess extensive H-bonds
( )
Alcohols are non polar
Acetic anhydride on reaction with ammonia produces
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23
Esterification of carboxylic acids completes in ____ steps. ( )
3
( )
2
( )
1
( )
4
Chlorination of carboxylic acid in presence of phosphorous produces
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28
Which of the following has highest melting point? ( )
Ethanol
( )
Propionic acid
( )
Acetic acid
( )
Formic acid
Which one of the following is not a fatty acid? ( )
Butyric acid
( )
Phthalic acid
( )
Propionic acid
( )
Palmitic acid
Urea is ( )
As ester
( )
An amino acid
( )
An amide
( )
A carboxylic acid
Which one of the following is the strongest acid? ( )
O-hydroxy benzoic acid
( )
Parahydroxy benzoic acid
( )
Benzoic acid
( )
M-hydroxy benzoic acid
Carboxylic acid on reaction with LiAlH4 in presence of ether produces
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29
Ester on hydrolysis produce
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Acetic acid is prepared on large scale from ( )
Acetylene
( )
Phenol
( )
Acetyl chloride
( )
Acetone
Which one of the following acids is the strongest? ( )
Acetic acid
( )
Formic acid
( )
Chloroacetic acid
( )
Dichloroacetic acid
Carboxylic 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
Oxidic acid is ( )
An aromatic dicarboxylic acid
( )
An aliphatic dicarboxylic acid
( )
An aromatic mono carboxylic acid
( )
An aliphatic mono carboxylic acid
Monocarboxylic acids exist as dimmer because of ( )
Cohesive forces
( )
Van der waal forces
( )
Dipole-dipole attraction
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Hydrogen bonding
Ethanoic acid reacts with PCl5 to give ethanoyl chloride, HCl and a third compound. What is the compound ( )
H3PO3
( )
COCl2
( )
POCl3
( )
SO2
SOCl2 changes acetic acid to ethanoyl chloride and the third product is ( )
POCl3
( )
COCl2
( )
SO2
( )
H3PO3
Which of the following posseses odour like pineapple? ( )
Amylacetate
( )
Amylbutyrate
( )
Ethylbutyrate
( )
Benzylacetate
In esterification process, H2SO4 acts as
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40
Essential amino acids are those amino acids which ( )
Beta-amino acids
( )
Alpha-amino acids
( )
Body can not synthesize
( )
Body can synthesize
Aspartic acid is ( )
Neutral amino acid
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( )
Basic amino acid
( )
None of these
( )
Acidic amino acid
Acetic acid is manufactured by ( )
Esterification
( )
Ozonolysis
( )
Distillation
( )
Fermentation
Which acid is used in the manufacture of synthetic fibre? ( )
Carbonic acid
( )
Acetic acid
( )
Phthalic acid
( )
Formic acid
Which of the following derivative can not be prepared directly from acetic acid? ( )
Acetic anhydride
( )
Acetyl chloride
( )
Ethyl acetate
( )
Acetamide
The solution of which acid is used for seasoning of food? ( )
Benzoic acid
( )
Nutanoic acid
( )
Formic acid
( )
Acetic acid
An 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
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48
( )
CH3-CH2-COOH
( )
CH3-CHO
Which of the following is not a fatty acid? ( )
Propanoic acid
( )
Acetic acid
( )
Butanoic acid
( )
Phthalic acid
Acetamide is prepared by ( )
Heating ammonium acetate
( )
Heating methyl canidey
( )
Heating ethyl acetate
( )
The hydrolysis of methyl cyanide
Reaction of alcohol with carboxylic acid is known as
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49
50
Acetic acid is characterized as a weak acid because it ( )
Has less density
( )
Is less volatile
( )
Is less viscous
( )
Has less dissociation
When acetic acid and ethanol react together, an ester is formed which is called
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55
When 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
Ethyl 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
Which of the following is used as essence of orange? ( )
Octyl acetate
( )
Isoamyl acetate
( )
Methyl butyrate
( )
Isoamyl valerate
The artificial smell of banana is produced in many articles by using ( )
Amyl acetate
( )
Octyl acetate
( )
Isoamyl valerate
( )
Methyl butyrate
The acid present in stings of bees and wasps is
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56
Acetic acid is weak acid because it
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( )
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
Which 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
Optical activity is possible in ( )
Oxalic acid
( )
Tartaric acid
( )
Acetic acid
( )
Formic acid
Which one of the following has both hydroxyl and carboxylic acid group? ( )
Phthalic acid
( )
Phenol
( )
Picric acid
( )
Salicylic acid
The OH group present in acids may be replaced by Cl atom on treatment with ( )
PCl5
( )
SOCl2
( )
Both of these
( )
None of these
If large number of amino acids (100-1000) are joined by peptide
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bonds, the resulting product is called
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( )
Dipeptide
( )
Tripeptide
( )
None of these
( )
Polypeptide
A peptide having molecular mass upto 10,000 is called ( )
Dipeptide
( )
Protein
( )
Polypeptide
( )
Vitamin
Calcium acetate when dry distilled gives
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65
66
Which 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
In 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
Acetic anhydride is obtained from acetyl chloride by the reaction of ( )
CH3COONa
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68
( )
CH3COCH3
( )
P2O5
( )
H2SO4
Toluene can be oxidized to benzoic acid by ( )
KMnO4 (alk)
( )
K2Cr2O7 (acidic)
( )
Both
( )
None
Heating mixture of sodium benzoate and soda lime ives
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70
71
Sulphonation of benzoic acid produces mainly ( )
O and p-sulphobenzoic acid
( )
M-sulphobenzoic acid
( )
O-sulphobenzoic acid
( )
P-sulphobenzoic acid
Formic 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
Given below are some statements concerning formic acid, which of theem is true? ( )
It is weaker acid than acetic acid
( )
It is an oxidizing agent
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( )
It is a reducing agent
( )
When its calcium salt is heated, it forms a ketone
Two 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
Which will not give acetamide on reaction with ammonia? ( )
Acetic anhydride
( )
Acetyl chloride
( )
Methyl propionate
( )
Acetic acid
When acetamide is hydrolysed by boiling with acid the product obtained is ( )
Acetaldehyde
( )
Ethyl amine
( )
Acetic acid
( )
Ethyl alcohol
Acetic 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
Acetic acid is manufactured by the fermentation of ( )
Ethanal
( )
Ethanol
( )
Methanol
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Methanal
Of 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
Amides 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
When acetamide reacts with Br2 and caustic soda, then we get ( )
Acetic acid
( )
Bromoacetic acid
( )
Methyl amine
( )
Ethyl amine
Aspirin is ( )
Benzoic acid
( )
Phenyl salicylic acid
( )
Salicylic acid
( )
Acetyl salicylic acid
Which of the following does give violet colour with neutral ferric chloride? ( )
Salicylic acid
( )
Benzoic acid
( )
Formine acid
( )
Acetic acid
A nucleophilic reagent will readily attack
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( )
Ethylene
( )
Ethyne
( )
Ethanoyl chloride
( )
Ethanal
The reaction of acetaldehyde with HCN followed by hydrolysis gives a product which exhibits ( )
Metamerism
( )
Enantiomerism
( )
Tautomerism
( )
Geometrical isomerism
An organic compound having molecular formula C2H4O2 is ( )
Propionic acid
( )
Oxalic acid
( )
Formic acid
( )
Acetic acid
Weakest acid among following is ( )
Acetylene
( )
Phenol
( )
Water
( )
Acetic acid
Ethyl alcohol reacts with acetyl chloride to form ( )
Methyl acetate
( )
Acetic acid
( )
Ethyl acetate
( )
Ethyl chloride
Acetamide is ( )
Highly acidic
( )
Highly basic
( )
Amphoteric
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Neutral
Acetamide and NaOBr/OH- produce ( )
CH3CN
( )
Ethanamine
( )
Methanamine
( )
NH3
What is formed when oxalic acid is dehydrated by conc.H2SO4? ( )
C+CO2
( )
CO2
( )
CO + CO2
( )
CO
Correct order of acid stength of benzamide, aniline and cyclohexylamine is
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91
92
93
Acyl halide is formed by reacting PCl5 with ( )
Alcohol
( )
Both carboxylic acid as well as esters
( )
Ester
( )
Amide
From 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
Lactic acid on heating with dil.H2SO4 gives
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98
( )
Formic acid
( )
Propionic acid
( )
Acrylic acid
( )
Acetic acid
A 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
Alkaline hydrolysis of urea with dil.NaOH gives ( )
Nitrogen and sodium carbonate
( )
Ammonia and sodium carbonate
( )
Ammonia and cyanuric acid
( )
Biuret and ammonia
Which 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
In presence of aluminium ethoxide, aldehydes get converted into esters. The reaction is known as ( )
Aldol condensation
( )
Tischenko reaction
( )
Beckmann's rearrangement reaction
( )
Schmidt react
The acid showing salt like character in aqueous solution is ( )
Acetic acid
( )
Formic acid
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100
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102
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104
( )
Alpha-aminoacetic acid
( )
Benzoic acid
The order of decreasing ease of reaction with ammonia is ( )
Ethers, anhydrides, esters
( )
Anhydrides, ethers, esters
( )
Esters, ethers, anhydrides
( )
Anhydride, esters, ethers
Which of the following is the strongest acid? ( )
CF3COOH
( )
CH3COOH
( )
CCl3COOH
( )
CBr3COOH
If acetyl chloride is reduced in the presence of BaSO4 and Pd, then ( )
CH3CH2OH is formed
( )
CH3COOH is formed
( )
CH3COCH3 is formed
( )
CH3CHO is formed
Hydrolysis of trichloromethane with aqueous KOH gives ( )
Chloral
( )
Potassium formate
( )
Methanol
( )
Acetylene
Lower carboxylic acids are soluble in water due to ( )
Easy hydrolysis
( )
Dissociation into ions
( )
Low molecular weight
( )
Hydrogen bonding
Ethyl acetate reacts with CH3MgBr to form
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106
107
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109
( )
Tertiary alcohol
( )
Primary alcohol
( )
Secondary alcohol
( )
Acid
Sponification of ethyl benzoate with caustic soda ( )
Benzoic acid, sodium ethoxide
( )
Benzyl alcohol, ethanoic acid
( )
Sodium benzoate, ethanol
( )
Phenol, ethanoic acid
Which of the following compounds on boiling with KMnO4 (alk) and subsequent acidification will not give benzoic acid? ( )
Benzyl alcohol
( )
Anisole
( )
Acetophenone
( )
Toluene
Rosenmund's reduction of an acyl chloride gives ( )
An alcohol
( )
An aldehyde
( )
An hydrocarbon
( )
An ester
Which 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
Rearrangement of an oxime to an amide in the presence of strong acid is called ( )
Aldol condensation
( )
Fries rearrangement
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111
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( )
Beckman rearrangement
( )
Curtius rearrangement
What 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
When propanamide reacts with Br2 and NaOH, ___________________________ is formed. ( )
Propyl alcohol
( )
Ethyl amine
( )
Ethyl alcohol
( )
Propyl amine
HCOOH reacts with conc.H2SO4 to produce ( )
NO
( )
CO
( )
NO2
( )
CO2
Hydrolysis of an ester gives a carboxylic acid which on kolbe's electrolysis yields ethane, the ester is ( )
Methyl ethanoate
( )
Ethyl methanoate
( )
Propylamine
( )
Ethylamine
Lactic acid on oxidation by alkaline potassium permanganate gives ( )
Propionic acid
( )
Pyruvic acid
( )
Cinnamic acid
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Tartaric acid
Ethyl acetate is obtained when methyl magnesium iodide reacts with ( )
Ethyl chloroformate
( )
Ethyl formate
( )
Carbon dioxide
( )
Acetyl chloride
Carboxilic 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
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