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Exam on Carboxylic Acids and Its Derivatives, Exams of Organic Chemistry

University of San Carlos (USC)Organic Chemistry

Carboxylic Acids, Esters, Amines, and Amides

Typology: Exams

2021/2022

Uploaded on 07/08/2024

alch3mist
alch3mist 🇵🇭

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Name: ________________________________
Encircle the letter of the correct answer.
1. Hydrolysis of CH3CH2CO2CH3 with 85% H2SO4 gives
which of the following compound?
a) CH3CH2COOH and CH2OH
b) CH3COOH and CH3OH
c) CH3CH=NOH and CH3CH2COOH
d) CH3OH and CH3CH2COOH
2. 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
3. Acetic acid is manufactured by the fermentation of
which of the following reaction?
a) Ethanol
b) Methanol
c) Ethanal
d) Methanal
4. 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
5. Which of the following gives benzoic acid on
oxidation?
a) Chlorophenol
b) Chlorotoluene
c) Chlorobenzene
d) Benzyl chloride
6. In the below sequence of reactions, A and B are
which of the following?
Find A & B in the given reaction
a) (CH3)2C(OH)CN, (CH3)2C(OH)COOH
b) (CH3)2C(OH)CN, (CH3)2C(OH)2
c) (CH3)2C(OH)CN, (CH3)2CHCOOH
d) (CH3)2C(OH)CN, (CH3)2C=O
7. 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
8. If o-xylene when oxidised in
presence of V2O5 the product is
which carboxylic acid?
a) Benzoic acid
c) Phthalic acid
b) Phenyl acetic acid
d) Acetic acid
9. The below reaction is called as which of the following
name reaction?
a) Wurtz reactions
b) Koch reaction
c) Clemenson’s reduction
d) Kolbe’s reaction
10. By aerial oxidation, which one of the following gives
phthalic acid?
a) Naphthalene
b) Benzene
c) Mesitylene
d) Toluene
11. Which of the following acids has the smallest
dissociation constant?
a) CH3CHFCOOH
b) FCH2CH2COOH
c) BrCH2CH2COOH
d) CH3CHBrCOOH
12. The vapour of a carboxylic acid when passed over
MnO2 at 573 K yields propanone. What is the acid?
a) Methanoic acid
b) Ethanoic acid
c) Propanoic acid
d) Butanoic acid
13. Which acid is strongest or which is most acidic?
a) Cl2CH.COOH
b) ClCH2COOH
c) CH3COOH
d) Cl3C.COOH
pf3
pf4
pf5

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Download Exam on Carboxylic Acids and Its Derivatives and more Exams Organic Chemistry in PDF only on Docsity!

Name: ________________________________

Encircle the letter of the correct answer.

  1. Hydrolysis of CH 3 CH 2 CO 2 CH 3 with 85% H 2 SO 4 gives which of the following compound? a) CH 3 CH 2 COOH and CH 2 OH b) CH 3 COOH and CH 3 OH c) CH 3 CH=NOH and CH 3 CH 2 COOH d) CH 3 OH and CH 3 CH 2 COOH
  2. 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
  3. Acetic acid is manufactured by the fermentation of which of the following reaction? a) Ethanol b) Methanol c) Ethanal d) Methanal
  4. When benzyl alcohol is oxidised with KMnO 4 , the product obtained is which of the following compound? a) Benzaldehyde b) Benzoic acid c) CO 2 and H 2 O d) Benzophenone
  5. Which of the following gives benzoic acid on oxidation? a) Chlorophenol b) Chlorotoluene c) Chlorobenzene d) Benzyl chloride
  6. In the below sequence of reactions, A and B are which of the following?

Find A & B in the given reaction a) (CH 3 ) 2 C(OH)CN, (CH 3 ) 2 C(OH)COOH b) (CH 3 ) 2 C(OH)CN, (CH 3 ) 2 C(OH) 2 c) (CH 3 ) 2 C(OH)CN, (CH 3 ) 2 CHCOOH d) (CH 3 ) 2 C(OH)CN, (CH 3 ) 2 C=O

  1. Formic acid is obtained when which of the given reaction occurs? a) Calcium acetate is heated with conc. H 2 SO 4 b) Calcium formate is heated with calcium acetate c) Glycerol is heated with oxalic acid at 110 ℃ d) Acetaldehyde is oxidised with K 2 Cr 2 O 7 and H 2 SO 4
    1. If o -xylene when oxidised in presence of V 2 O 5 the product is which carboxylic acid?

a) Benzoic acid c) Phthalic acid

b) Phenyl acetic acid d) Acetic acid

  1. The below reaction is called as which of the following name reaction?

a) Wurtz reactions b) Koch reaction c) Clemenson’s reduction d) Kolbe’s reaction

  1. By aerial oxidation, which one of the following gives phthalic acid? a) Naphthalene b) Benzene c) Mesitylene d) Toluene
  2. Which of the following acids has the smallest dissociation constant? a) CH 3 CHFCOOH b) FCH 2 CH 2 COOH c) BrCH 2 CH 2 COOH d) CH 3 CHBrCOOH
  3. The vapour of a carboxylic acid when passed over MnO 2 at 573 K yields propanone. What is the acid? a) Methanoic acid b) Ethanoic acid c) Propanoic acid d) Butanoic acid
  4. Which acid is strongest or which is most acidic? a) Cl 2 CH.COOH b) ClCH 2 COOH c) CH 3 COOH d) Cl 3 C.COOH
  1. The acid which reduces Fehling solution is which of the following? a) Methanoic acid b) Ethanoic acid c) Butanoic acid d) Propanoic acid
  2. Which class of compounds shows H-bonding even more than in alcohols? a) Phenols b) Carboxylic acids c) Ethers d) Aldehydes
  3. Which of the following is the strongest acid? a) CH 3 COOH b) BrCH 2 COOH c) ClCH 2 COOH d) FCH 2 COOH
  4. The reaction of HCOOH with conc. H 2 SO 4 gives which of the following compound? a) CO 2 b) CO c) Oxalic acid d) Acetic acid
  5. Which one is strongest acid among following options? a) CH 2 FCOOH b) CH 2 ClCOOH c) CHCl 2 COOH d) CHF 2 COOH
  6. 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
  7. In CH 3 COOH and HCOOH, HCOOH will be which of the following? a) Less acidic b) Equally acidic c) More acidic d) Cannot say about acidic behaviour
  8. Hydrogenation of C 6 H 5 CHOH−COOH over Rh−Al 2 O 3 catalyst in methanol gives which of the following? a) C 6 H 5 CH 2 COOH b) C 6 H 11 CHOHCOOH c) C 6 H 5 CHOHCH 2 OH d) C 6 H 11 CH 2 COOH

2 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

  1. In a set of the given reactions, acetic acid yielded a product C.

Find product yielded by acetic acid in set of given reactions What would be product C? a) CH 3 −C-C 2 H 5 (OH)C 6 H 5 b) CH 3 CH(OH)C 2 H 5 c) CH 3 COC 6 H 5 d) CH 3 CH(OH)C 6 H 5

  1. 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
  2. When propionic acid is treated with aqueous sodium bicarbonate CO 2 is liberated. The ‘C’ of CO 2 comes from which of the following? a) Methyl group b) Carboxylic acid group c) Methylene group d) Bicarbonate
  3. The compound not soluble in acetic acid is which of the following? a) CaCO 3 b) CaO c) CaC 2 O 4 d) Ca(OH) 2
  4. 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

  1. 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
  2. What will be the product for the given reaction?

CH 3 OH + CO →?

a) Ethyl formate b) Methyl formate c) Ethyl acetate d) Methyl acetate

  1. 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
  2. What will be the product for the given reaction?

C 2 H 4 + CH 3 CO2H + 1⁄2 O 2 →?

a) Ethyl formate b) Vinyl formate c) Ethyl acetate d) Methyl acetate

  1. What is the characteristic smell for ester? a) Fruity like smell b) Fish like smell c) Rotten egg smell d) Alcoholic smell
  2. 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
  3. What will be the product of given reaction? The product of given reaction is Carboxylic acid & alkene a) Ether and alcohol b) Alcohol and sodium carboxylate c) Aldehyde and alcohol d) Carboxylic acid and alkene
  4. Fries rearrangement reaction of phenol ester leads to the formation which type of product? a) Ketone b) Aldehyde

c) Alcohol d) Alkene

  1. What is the order or solubility in water of the following compound?

i) ethyl methanoate ii) ethyl butanoate iii) ethyl ethanoate iv) ethyl propanoate

a) i > ii > iii > iv b) i > iii > iv > ii c) i > ii > iv > iii d) iii > i > iv > ii

  1. The amine formed from an amide by means of bromine and alkali has how many number of carbon atoms? a) Same number of C atoms as that of amide b) One less C atom than that of amide c) One more C atom than that of amide d) Two more C atoms than that of amide
  2. The compound X is which of the following?

a) CH 3 CONH 2 b) CH 3 CH 2 NH 2 c) C 2 H 6 d) CH 3 NHCH 3

  1. Ethylamine can be prepared by the action of bromine and caustic potash on which compound? a) Acetamide b) Propionamide c) Formamide d) Methyl cyanide View Answer
  2. Reduction of nitroalkanes yields which compound? a) Acid b) Alcohol c) Amine d) Diazo compounds
  3. What is the name of the reaction when acetamide changes into methylamine? a) Hofmann bromamide reaction b) Hofmann reaction c) Friedel-Craft’s reaction d) Hinsberg reaction
  1. When methyl iodide is heated with ammonia, what is the product obtained? a) Methylamine b) Dimethylamine c) Trimethylamine d) A mixture of Methylamine, Dimethylamine & Trimethylamine

5 7. The Hinsberg’s method is used for which of the following? a) Preparation of primary amines b) Preparation of secondary amines c) Preparation of tertiary amines d) Separation of amine mixtures

  1. Which one of the following compound gives a secondary amine on reduction? a) Nitromethane b) Nitrobenzene c) Methyl isocyanide d) Methyl cyanide
  2. In the given reaction what is the X? The X is Nitrile in given reaction a) Isonitrile b) Nitrile c) Nitrite d) Oxime View Answer
  3. When ethanol is mixed with ammonia and passed over alumina the compound formed is which compound? a) C 2 H 5 NH 2 b) C 2 H 4 c) C 2 H 5 OC 2 H 5 d) CH 3 OCH 3
  4. Which of the following compound is expected to be most basic? a) Aniline b) Methylamine c) Hydroxylamine d) Ethylamine
  5. A solution of methyl amine shows which type of property with litmus paper? a) Turns blue litmus red b) Turns red litmus blue c) Does not affect red or blue litmus d) Bleaches litmus
  6. Which of the following statement is true about methyl amine? a) Methyl amine is slightly acidic b) Methyl amine is less basic than NH c) Methyl amine is stronger base than NH d) Methyl amine forms salts with alkali
    1. By the presence of a halogen atom in the ring, what is the effect of this on basic properties of aniline? a) Increased b) Decreased c) Unchanged d) Doubled
    2. What is the characteristic smell of liquid amines? a) Fish like smell b) Rotten egg smell c) Fruity smell d) Bitter almond smell
    3. Which of the following have less melting point than amine? a) Alcohol b) Phosphine c) Carboxylic acid d) Ether View Answer
    4. Which of the following amine has highest boiling point? a) Butyl amine b) Diethylamine c) Triethylamine d) Dipropylamine
    5. What is the correct decreasing order of the basic character of the three amines and ammonia? a) NH 3 > CH 3 NH 2 > C 2 H 5 NH 2 > C 6 H 5 NH 2 b) C2H 5 NH 2 > CH 3 NH 2 > NH 3 > C 6 H 5 NH 2 c) C 6 H 5 NH 2 > C 2 H 5 NH 2 > CH 3 NH 2 > NH 3 d) CH 3 NH 2 > C 2 H 5 NH 2 > C 6 H 5 NH 2 > NH 3
    6. Unpleasant smelling carbylamines are formed by heating alkali and chloroform with which of the following? a) Any amine b) Any aliphatic amine c) Any aromatic amine d) Any primary amine View Answer
    7. Which statement is an incorrect statement? a) Amines form hydrogen bond b) Ethyl amine has higher boiling point than propane c) Methyl amine is more basic than ammonia d) Dimethyl amine is less basic than methyl amine View Answer
    8. Which of the following is most basic? a) C 6 H 5 NH 2 b) (CH 3 ) 2 NH c) (CH 3 ) 3 N d) NH 3