Condensation Reactions Flashcards by Khristine Tapado

Condensation reaction is the reverse of which of the
following reaction?
a) lock and key hypothesis
b) oxidation
c) hydrolysis
d) glycogen formation

c) hydrolysis

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Condensation reaction always results in the formation
of complex sugar (disaccharide or polysaccharide) and
which of the following?
a) amino acids
b) lipids
c) water
d) maltose

c) water

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In which condensation an enol or an enolate ion reacts
with a carbonyl compound to form a β-hydroxyaldehyde
or β-hydroxyketone (an aldol reaction), followed by
dehydration to give a conjugated enone happens?
a) Aldol condensation
b) Claisen reduction
c) Henry condensation
d) Knoevenagel condensation

a) Aldol condensation

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Which of the following statements is wrong?
a) The base-catalysed α-halogenation of propanone is first order in the concentration of the base
b) The rate constant for the base-catalysed α-halogenation
of propanone decreases in the order Cl2 > Br2 > I2
c) The base-catalysed α-halogenation of propanone
proceeds easily to give 1,1,1-trihalopropanone
d) Polyhalogenation of propanone is difficult under acidic
conditions, but the products are the same as those
obtained under basic conditions

b) The rate constant for the base-catalysed α-halogenation
of propanone decreases in the order Cl2 > Br2 > I2

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Which of the following statements is wrong?
a) Hydrolysis of an acetal is catalysed by acids
b) Hydrolysis of an acetal is catalysed by aqueous acid
c) Oximes are stabilized by conjugation between the C=N
and OH groups
d) Enamines are formed between secondary amines and
the carbonyl group of aldehydes and ketones

b) Hydrolysis of an acetal is catalysed by aqueous acid

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Acetal on acid hydrolysis generates which of the
following?
a) Alcohol
b) Amine and aldehyde
c) Ketone and alcohol
d) Ketone and ether

c) Ketone and alcohol

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Dimethoxymethane is dimethyl acetal of which of the
following?
a) Formaldehyde
b) Acetaldehyde
c) Tolualdehyde
d) Propionaldehyde

a) Formaldehyde

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Which of the following is not polyacetal?
a) Dimethoxymethane
b) Dioxolane
c) Starch
d) Cellulose

d) Cellulose

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In keto-enol from presence of which type of hydrogen is
must?
a) Alpha
b) Beta
c) Gamma
d) Any position of hydrogen

a) Alpha

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Which of the following tautomeric form is more stable?
CH3-CH=O ↔ CH2=C-OH
(I) (II)
a) I
b) II
c) Both are equally stable
d) Both are unstable

a) I

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Hydrolysis of CH3CH2NO2 with 85% H2SO4 gives which of
the following compound?
a) CH3CH2OH
b) C2H6
c) CH3CH=NOH
d) CH3COOH

d) CH3COOH

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Acetic acid is obtained when which of the given reaction
takes place?
a) Methyl alcohol is oxidised with potassium
permanganate
b) Calcium acetate is distilled in the presence of calcium
formate
c) Acetaldehyde is oxidised with potassium dichromate
and sulphuric acid
d) Glycerol is heated with sulphuric acid

c) Acetaldehyde is oxidised with potassium dichromate
and sulphuric acid

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Acetic acid is manufactured by the fermentation of
which of the following reaction?
a) Ethanol
b) Methanol
c) Ethanal
d) Methanal

a) Ethanol

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When benzyl alcohol is oxidised with KMnO4, the
product obtained is which of the following compound?
a) Benzaldehyde
b) Benzoic acid
c) CO2 and H2O
d) Benzophenone

a) Benzaldehyde

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Which of the following gives benzoic acid on oxidation?
a) Chlorophenol
b) Chlorotoluene
c) Chlorobenzene
d) Benzyl chloride

d) Benzyl chloride

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Formic acid is obtained when which of the given
reaction occurs?
a) Calcium acetate is heated with conc. H2SO4
b) Calcium formate is heated with calcium acetate
c) Glycerol is heated with oxalic acid at 110℃
d) Acetaldehyde is oxidised with K2Cr2O7 and H2SO4

c) Glycerol is heated with oxalic acid at 110℃

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o-xylene when oxidised in presence of V2O5 the product
is which carboxylic acid?
a) Benzoic acid
b) Phenyl acetic acid
c) Phthalic acid
d) Acetic acid

c) Phthalic acid

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By aerial oxidation, which one of the following gives
phthalic acid?
a) Naphthalene
b) Benzene
c) Mesitylene
d) Toluene

a) Naphthalene

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Which of the following acids has the smallest
dissociation constant?
a) CH3CHFCOOH
b) FCH2CH2COOH
c) BrCH2CH2COOH
d) CH3CHBrCOOH

c) BrCH2CH2COOH

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The vapour of a carboxylic acid HA when passed over
MnO2 at 573 K yields propanone. What is the acid HA?
a) Methanoic acid
b) Ethanoic acid
c) Propanoic acid
d) Butanoic acid

b) Ethanoic acid

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Which acid is strongest or Which is most acidic?
a) Cl2CH.COOH
b) ClCH2COOH
c) CH3COOH
d) Cl3C.COOH

b) ClCH2COOH

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The acid which reduces Fehling solution is which of the
following?
a) Methanoic acid
b) Ethanoic acid
c) Butanoic acid
d) Propanoic acid

a) Methanoic acid

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Which class of compounds shows H-bonding even more
than in alcohols?
a) Phenols
b) Carboxylic acids
c) Ethers
d) Aldehydes

b) Carboxylic acids

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Which of the following is the strongest acid?
a) CH3COOH
b) BrCH2COOH
c) ClCH2COOH
d) FCH2COOH

d) FCH2COOH

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7. The reaction of HCOOH with conc.H2SO4 gives which of the following compound? a) CO2 b) CO c) Oxalic acid d) Acetic acid

b) CO

8. Which one is strongest acid among following options? a) CH2FCOOH b) CH2ClCOOH c) CHCl2COOH d) CHF2COOH

b) CH2ClCOOH

9. Acetic acid is weak acid than sulphuric acid because which of the following reasons? a) It decomposes on increasing temperature b) It has less degree of ionisation c) It has -COOH group d) It has more inductive effect

b) It has less degree of ionisation

10. In CH3COOH and HCOOH, HCOOH will be which of the following? a) Less acidic b) Equally acidic c) More acidic d) cannot say about acidic behaviour

c) More acidic

1. Hydrogenation of C6H5CHOH−COOH over Rh−Al2O3catalyst in methanol gives which of the following? a) C6H5CH2COOH b) C6H11CHOHCOOH c) C6H5CHOHCH2OH d) C6H11CH2COOH

b) C6H11CHOHCOOH

2. In the anion HCOO− the two carbon-oxygen bonds are found to be of equal length. What is the reason for it? a) Electronic orbitals of carbon atom are hybridised b) The C = O bond is weaker than the C – O bond c) The anion HCOO− has two resonating structures d) The anion is obtained by removal of a proton form the acid molecule

b) The C = O bond is weaker than the C – O bond

4. Carboxylic acids are more acidic than phenol and alcohol because of which of the following? a) Intermolecular hydrogen bonding b) Formation of dimers c) Highly acidic hydrogen d) Resonance stabilization of their conjugate base

d) Resonance stabilization of their conjugate base

5. When propionic acid is treated with aqueous sodium bicarbonate CO2 is liberated. The ‘C’ of CO2 comes from which of the following? a) Methyl group b) Carboxylic acid group c) Methylene group d) Bicarbonate

d) Bicarbonate

6. The compound not soluble in acetic acid is which of the following? a) CaCO3 b) CaO c) CaC2O4 d) Ca(OH)2

c) CaC2O4

7. Identify the wrong statement from the following? a) Salicylic acid’s a monobasic acid b) Methyl salicylate is an ester c) Salicylic acid gives violet colour with neutral ferric chloride as well as brisk effervescence with sodium bicarbonate d) Methyl salicylate does not occur in natural oils

d) Methyl salicylate does not occur in natural oils

8. When CH3COOH reacts with CH3−Mg−X, which of the following is formed? a) CH3COX is formed b) Hydrocarbon is formed c) Acetone is formed d) Alcohol is formed

b) Hydrocarbon is formed

9. Hydrolysis of an ester gives a carboxylic acid which on Kolbe’s electrolysis yields ethane. The ester is which of the following? a) Ethyl methonoate b) Methyl ethanoate c) Propylamine d) Ethylamine

b) Methyl ethanoate

10. Sulphonation of benzoic acid produces mainly which of the following? a) o-sulphobenzoic acid b) m-sulphobenzoic acid c) p-sulphobenzoic acid d) o- and p-sulphobenzoic acid

b) m-sulphobenzoic acid

2. Benzoyl chloride is prepared from benzoic acid by which of the following? a) Cl2, hv b) SO2, Cl2 c) SOCl2 d) Cl2, H2O

b) SO2, Cl2

3. When formic acid reacts with PCl5 it forms which of the following? a) Formyl chloride b) Acetyl chloride c) Methyl chloride d) Propionyl chloride

a) Formyl chloride

4. Laboratory method for the preparation of acetyl chloride is which of the following? a) CH3COOH + SOCl2→CH3COCl b) CH3COOH + PCl3→CH3COCl c) CH3COONa + PCl3→CH3COCl d) CH3COONa + PCl3→CH5COCl

a) CH3COOH + SOCl2→CH3COCl

9. Which of the following is the product B when acid chloride reacts with alcohol? RCOCl + R′OH → B + HCl a) Chlorophenol b) Ester c) Ether d) Acetyl chloride

b) Ester

5. Which of the following gives benzoic acid on oxidation? a) Chlorophenol b) Chlorotoluene c) Chlorobenzene d) Benzyl chloride

d) Benzyl chloride

7. What will be the product B in the given reaction? 2 C6H5COCl + H2O2 + 2 NaOH → B + 2 NaCl + 2 H2O a) Chlorophenol b) Chlorotoluene c) Chlorobenzene d) Benzyl peroxide

d) Benzyl peroxide

2. What will be the reactivity order of the following with water? a) acid halide > ester > acid anhydride > amide b) acid anhydride > amide > acid halide > ester c) amide > ester > acid anhydride > acid halide d) acid halide > acid anhydride > ester > amide

d) acid halide > acid anhydride > ester > amide

10. For synthesis of carboxylic acid, the intermediate product needed is which of the following? a) Acyl chloride b) aryls c) benzene d) carboxylic acid

a) Acyl chloride

6. What is the product D in the given reaction? C6H5CCl3 + C6H5CO2H → 2 C6H5COCl + D a) Cl2 b) H2O c) HCl d) H2

c) HCl

6. Which of the following compounds would be converted to acetic anhydride when treated with sodium acetate? a) Acetaldehyde b) Acetyl chloride c) Methyl acetate d) Acetamide

b) Acetyl chloride

5. Acetic anhydride is less reactive toward attack by a nucleophile than which of the following? a) Acetic acid b) Ethyl acetate c) Acetyl chloride d) Acetonitrile

c) Acetyl chloride

1. When acetamide is treated with HNO2, the gas is evolved which of the following? a) H2 b) O2 c) N2 d) CH4

c) N2

2. On heating acetamide in presence of P2O5, which of the following is formed? a) Ammonium acetate b) Acetonitrile c) NH3 d) Methylamines

b) Acetonitrile

4. By refluxing unsubstituted amide with acid, it will yield which of the following product(s)? a) ammonia b) carboxylic acid c) nitrogen gas d) ammonia and carboxylic acid

d) ammonia and carboxylic acid

9. What is the formed product when acid anhydride is hydrolyzed? a) Aldehyde b) Ketone c) Alcohols d) Carboxylic acid

d) Carboxylic acid

3. Decreasing order of basicity of the given compound is which of the following? (1) CH3CONH2 (2) CH3CH2NH2 (3) PhCH2CONH2 a) 1 > 2 > 3 b) 2 > 1 > 3 c) 3 > 2 > 1 d) 1 > 3 > 2

b) 2 > 1 > 3

5. Which one of the following reducing agents is likely to be the most effective in bringing about the following change? R−CONH2 → RCH2NH2 a) H2−Ni b) NaBH4 c) LiAlH4 d) Na-alcohol

a) H2−Ni

6. Ethyl amine on acetylation gives which of the following? a) N-ethyl acetamide b) Acetamide c) Methyl acetamide d) N,N-dimethyl acetamide

a) N-ethyl acetamide

8. Amides may be converted into amines by reaction named after which of the following reaction? a) Perkin b) Claisen c) Hoffmann d) Kolbe

c) Hoffmann

7. Benzamide on reaction with POCl3 gives which of the following? a) Aniline b) Chlorobenzene c) Benzyl amine d) Benzonitrile

d) Benzonitrile

3. What will be the product for the given reaction? CH3OH + CO →? a) Ethyl formate b) Methyl formate c) Ethyl acetate d) Methyl acetate

b) Methyl formate

4. Hydrolysis of ester leads to the formation of which of the following products in basic medium? a) Ether and alcohol b) Alcohol and sodium carboxylate c) Aldehyde and alcohol d) Sodium carboxylate

b) Alcohol and sodium carboxylate

2. Which of the following is used as catalyst for the esterification of carboxylic acid and alcohol? a) Nitrous acid b) Sulphuric acid c) Sulphurous acid d) Nitric acid

b) Sulphuric acid

7. Salts of carboxylate anions can be alkylating agent with alkyl halides to give esters. In the case that an alkyl chloride is used, an iodide salt can catalyze the reaction. What is the name reaction for the given reaction? a) Favorskii rearrangement b) Baeyer–Villiger oxidation c) Pinner reaction d) Finkelstein reaction

d) Finkelstein reaction

5. What will be the product for the given reaction? C2H4 + CH3CO2H + 1⁄2 O2 →? a) Ethyl formate b) Vinyl formate c) Ethyl acetate d) Methyl acetate

b) Vinyl formate

6. What is the characteristic smell for ester? a) Fruity like smell b) Fish like smell c) Rotten egg smell d) Alcoholic smell

a) Fruity like smell

9. Fries rearrangement reaction of phenol ester leads to the formation which type of product? a) Ketone b) Aldehyde c) Alcohol d) Alkene

a) Ketone

10. What is the order or solubility in water of the following compound? 1) ethyl methanoate 2) ethyl butanoate 3) ethyl ethanoate 4) ethyl propanoate a) 1 > 2 > 3 > 4 b) 1 > 3 > 4 > 2 c) 1 > 2 > 4 > 3 d) 3 > 1 > 4 > 2

b) 1 > 3 > 4 > 2

1. Which of the following is true about transesterification? a) exchanging the organic alkyl group of an ester with the organic group alkyl of an alcohol b) exchanging the organic alkyl group of an alcohol with the organic group alkyl of an ester c) exchanging the organic alkyl group of an ester with the organic group alkyl of an alkane d) exchanging the organic alkyl group of an ester with the organic group alkyl of an ether

a) exchanging the organic alkyl group of an ester with the organic group alkyl of an alcohol

2. What is the geometry of the intermediate formed in the mechanism of transesterification? a) Octahedral b) Square planner c) Tetrahedral d) Square bipyramidal

c) Tetrahedral

3. What chemical reaction makes biodiesel? a) Transesterification b) Sublimation c) Polymerization d) Fermentation

a) Transesterification

4. Polyethylene terephthalate is prepared by a transesterification reaction. a) True b) False

a) True

6. Transesterification reaction is an irreversible reaction. a) True b) False

b) False

5. What type of solution is used in transesterification for the determination of fatty acid compositions? a) Methanol in NaOH b) Methanol in NaCl c) Methanol in KOH d) Methanol in H2O

a) Methanol in NaOH

7. Which of the following is the product formed when methyl ethanoate and ethanol in presence of hydrochloric acid? a) Ethyl ethanoate b) Methyl ethanoate c) Ethyl propanoate d) Propyl ethanoate

a) Ethyl ethanoate

8. Which of the following is the product formed when alkylene carbonate and alcohol in presence of hydrochloric acid? a) Dialkyl carbonate b) Methyl ethanoate c) Alkyl carbonate d) Propyl ethanoate

a) Dialkyl carbonate

9. Which of the following is the product formed when methyl propanoate and ethanol in presence of hydrochloric acid? a) Ethyl ethanoate b) Methyl ethanoate c) Ethyl propanoate d) Propyl ethanoate

c) Ethyl propanoate

6. Which of the following statement is true about saponification value of oil? a) The shorter the chain of fatty acid, the higher is the saponification value b) The shorter the chain of fatty acid, the higher is the saponification value c) The higher the saturation in chain of fatty acid, the lower is the saponification value d) The lower the saturation in chain of fatty acid, the higher is the saponification value

a) The shorter the chain of fatty acid, the higher is the saponification value

3. Lye is used in soap-making. Lye is a concentrated solution of which ionic compound? a) K2CO3 b) CuSO4 c) NaOH d) NaCl

a) K2CO3

10. Which of the following is the product formed when butyl acetate and ethanol in presence of hydrochloric acid? a) Ethyl ethanoate b) Methyl acetate c) Ethyl acetate d) Propyl ethanoate

c) Ethyl acetate

1. Which of the following processes can saponification be used for? a) For the production of plastics b) In blow glass artistry c) To make soap d) The formation of alloys

c) To make soap

5. Which of the following is considered a useful alkali in saponification reactions? a) CCl4 b) Cl– c) NaOH d) Pb+

c) NaOH

9. Which of the following compound is an industrial manufacturing product by saponification? a) Sodium chloride b) Potassium hydroxide c) Glycerol d) Sodium hydroxide

c) Glycerol

4. Which of the following term describe saponification? a) Cleaving of ester molecules into carboxylic acid and alcohol b) Dehydration synthesis by removing water c) Hydrolysis of a salt by adding a weak acid d) Synthesis of two alkyl groups to make an ether

a) Cleaving of ester molecules into carboxylic acid and alcohol

8. Saponification value is the number of milligrams of KOH required to saponify what present in the 1g of oil or fat? a) Salts b) Hydrocarbon c) Fatty acids d) unsaturation

c) Fatty acids

7. Which of the following fat or oil is unsaponifiable? a) Paraffin wax b) Bee wax c) Olive oil d) Shea butter

a) Paraffin wax

10. Soap can be precipitated out by salting by using which chemical compound? a) Sodium chloride b) Potassium hydroxide c) Glycerol d) Sodium hydroxide

a) Sodium chloride

Condensation Reactions Flashcards

(84 cards)