Carboxylic Acids

October 8, 2017 | Author: Zunaira Noreen | Category: Ester, Acetic Acid, Acid, Ethanol, Carboxylic Acid
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Multiple Choice Questions on Carboxylic acids, preparation and properties...

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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:

Match

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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13

14

15

16

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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( ) 18

CH3OH

Acetamide on hydrolysis gives

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19

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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22

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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24

25

26

27

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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30

31

32

33

34

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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( ) 35

36

37

38

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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39

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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41

42

43

44

45

( )

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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46

47

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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51

52

53

54

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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57

58

59

60

61

( )

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

62

63

( )

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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64

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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67

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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69

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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72

73

74

75

76

( )

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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( ) 77

78

79

80

81

82

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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83

84

85

86

87

( )

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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( ) 88

89

90

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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94

95

96

97

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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99

100

101

102

103

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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105

106

107

108

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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110

111

112

113

114

( )

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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( ) 115

116

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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