Category: MCQ

Cycloalkanes MCQ with Answers of Pharmaceutical Organic Chemistry 2 B.Pharm 3rd Semester. All the Multiple Choice Questions and Answers share in this post are extremely helpful from an exam perspective so read and learn them all.

Cycloalkanes MCQ with Answers | Pharmaceutical Organic Chemistry 2 | B.Pharm 3rd Semester

1.Cyclopropane is synthesised from

• 2 moles of ethyl chloride
• 1,3-Dichloropropane
• Calcium adipate
• Diethyl adipate

Ans: 1,3-Dichloropropane

2. Cyclopropane on oxidation with conc H2SO4 gives

• Isopropyl alcohol
• n-Propyl alcohol
• Butanol
• Epoxide

Ans: n-Propyl alcohol

3. Cyclopropane on reduction with conc with Ni/H2 at 80 °C gives

• Ethane
• Butane
• Propane
• Pentane

Ans: Propane

4. Cyclopropane on halogenation with Cl2/FeCl3 gives

• 1,1-Dichloropropane
• 1,2-Dichloropropane
• 1,3-Dichloropropane
• 1,2,3-Trichloropropane

Ans: 1,3-Dichloropropane

5. According to Baeyer strain theory, Heat of combustion of the cycloalkanes

• Increases as the ring size increases
• Decreases as the ring size increases
• No change in Heat of combustion
• None of the above

Ans: Decreases as the ring size increases

6. According to Baeyer strain theory, which of the following cycloalkane is stable

• Cyclopropane
• Cyclobutane
• Cyclopentane
• Cyclohexane

Ans: Cyclopentane

7. According to Baeyer strain theory, which of the following conformer of cycloalkane is
more stable

• Chair form
• Boat form
• Twist-chair form
• Twist-boat form

Ans: Chair form

8. According to Baeyer strain theory, which of the following statement is TRUE

• Lesser potential energy in Chair form compare to other conformers
• Larger potential energy in Chair form than boat form
• Larger potential energy in twist-boat form than boat form
• Both chair and boat form have similar potential energy

Ans: Lesser potential energy in Chair form compare to other conformers

9. Cycloalkanes are associated with the general formula

• CnH2n+2
• CnH2(n+2)
• CnH2n+1-r
• CnH2(n+1-r)

Ans: CnH2(n+1-r)

10. Identify the incorrect statement regarding cycloalkanes

• These have sp3 hybridized carbons
• These have tetrahedral bond angles
• Stability of the cycloalkanes varies directly with their respective size
• These undergo nucleophilic substitution reactions

Ans: These have tetrahedral bond angles

11. Identify the compound with the highest ring strain

• Cyclohexane
• Cyclopropane
• Cyclobutane
• Cyclopentane

Ans: Cyclopropane

12. Which among the following compounds explodes on contact with oxygen

• Cyclopropane
• Cyclobutane
• Cyclopentane
• Cyclohexane

Ans: Cyclopropane

13. Identify the alicyclic hydrocarbon which is highly flammable

• Cycloheptane
• Cyclopentane
• Cyclopropane
• Cyclooctane

14. Identify the incorrect statement regarding cyclohexane:

• It is non-polar
• It serves as an organic solvent
• It a hydrophilic hydrocarbon
• It is commercially used for variety of applications

Ans: It is a hydrophilic hydrocarbon

15. Cycloalkanes have the same molecular formula as

• Alkanes
• Alkenes
• Akynes
• Cycloalkenes

Ans: Alkenes

16. Which of the following cycloalkane is most reactive?

• Cyclohexane
• Cyclopropane
• Cyclobutane
• Cyclopentane

Ans: Cyclopropane

17. Which of the following molecules will decolourise bromine in carbon tetrachloride
most readily?

• 1,2-Dimethylcyclopropane
• 1,2-Dimethylcyclobutane
• Cylcopentane
• Cyclohexane

Ans: 1,2-Dimethylcyclopropane

18. Cyclobutane reacts with hydrogen in the presence of nickel catalyst at 200 °C to give

• Butane
• 1-Butene
• 2-Butene
• None of these

Ans: Butane

19. The bond angle between carbon atoms in cyclohexane is

• 109° 28′
• 60°
• 90°
• 120°

Ans: 109° 28′

20. The bond angle between carbon atoms in cyclopropane is

• 109° 28′
• 60°
• 90
• 120

Ans: 60

21. The bond angle between carbon atoms in cyclobutane is

• 109° 28′
• 60°
• 90°
• 120°

Ans: 90°

22. The most stable conformation of cyclohexane is the

• Haworth form
• Boat form
• Chair form
• Newman form

Ans: Chair form

23. Which of the following statement is false about cyclohexane?

• It is a saturated cyclic hydrocarbon
• All C-C-C bond angles are 109° 28′
• Unstable, strained compound
• Exist in chair-form and boat-form

Ans: Unstable, strained compound

24. Gammexane is

• Hexachloroethane
• DDT
• Hexachlorocyclohexane
• TNT

Ans: Hexachlorocyclohexane

25. Which of the following correctly ranks the cycloalkanes in order of increasing ring strain per methylene?

• cyclopropane < cyclobutane < cyclohexane < cycloheptane
• cyclohexane < cyclopentane < cyclobutane < cyclopropane
• cyclopentane < cyclobutane < cyclopentane < cyclopropane
• cyclopentane < cyclopropane < cyclobutane < cyclohexane

Ans: cyclohexane < cyclopentane < cyclobutane < cyclopropane

26. Which of the following has two equatorial alkyl substituents in its most stable conformation?

• 1,1-dimethylcyclohexane
• cis-1,2-dimethylcyclohexane
• cis-1,3-diethylcyclohexane
• cis-1,4-diethylcyclohexane

Ans: cis-1,3-diethylcyclohexane

27. Which of the following cycloalkanes is most reactive?

• Cyclopropane
• Cyclohexane
• Cyclobutane
• Cycloheptane

Ans: Cyclopropane

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Polynuclear Hydrocarbons MCQ with Answer of Pharmaceutical Organic Chemistry 2 B.Pharm 3rd Semester. All the Multiple Choice Questions and Answers share in this post are extremely helpful from an exam perspective so read and learn them all.

Polynuclear Hydrocarbons MCQ with Answer | Pharmaceutical Organic Chemistry 2 | B.Pharm 3rd Semester

1.Naphthalene undergoes oxidation with Na2Cr2O7/H2SO4 to form

• Phthalic acid
• Benzoic acid
• Teraline
• Phenyl acetic acid

Ans: Phthalic acid

2. Naphthalene undergoes nitration with HNO3/H2SO4 at 60 °C to give mainly

• 1-Nitronapthalene
• 1,2-Nitronapthalene
• 2-Nitronapthalene
• 2,5-Nitronapthalene

Ans: 1-Nitronapthalene

3. Which of the following is starting material in Haworth’s synthesis of naphthalene

• succininc anhydride
• Phthalic anhydride
• acetic anhydride
• None of the above

Ans: succininc anhydride

4. Which of the following statement is TRUE in electrophilic aromatic substitution of
naphthalene

• α-Product forms
• β-product forms
• Both α & β product forms
• α product always predominates depending on the condition

Ans: α product always predominates depending on the condition

5. Nitration of naphthalene molecule at room temperature gives

• 1-nitronaphthalene
• 2-nitronaphthalene
• 4-nitronaphthalene
• 8-nitronaphthalene

Ans: 1-nitronaphthalene

6. Naphthalene on oxidation with CrO3/CH3COOH gives

• 1,2-Naphthoquinone
• 1,3-Naphthoquinone
• 1,4-Naphthoquinone
• No reaction

Ans: 1,4-Naphthoquinone

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7. Naphthalene on oxidation with V2O5 gives

• Succinic anhydride
• Phthalic anhydride
• Acetic anhydride
• No reaction

Ans: Phthalic anhydride

8. β-Napthalenediazonium chloride converted to naphthalene in the presence of

• H3PO2
• CuBr
• CuCN
• HCl

Ans: H3PO2

9. All carbon atoms in naphthalene are

• Sp hybridised
• sp2 hybridised
• sp3 hybidised
• None of the above

Ans: sp2 hybridised

10. Anthracene on bromination in the presence of Br2/CCl4 gives

• 9-Bromoanthracene
• 1-Bromoanthracene
• 2-Bromoanthracene
• 4-Bromoanthracene

Ans: 1-Bromoanthracene

11. Anthracene on sulphonation in presence of Con H2SO4 at high temperature gives

• 1-Anthracenesulfonic acid
• 2-Anthracenesulfonic acid
• 4-Anthracenesulfonic acid
• 9-Anthracenesulfonic acid

Ans: 2-Anthracenesulfonic acid

12. Anthracene on sulphonation in presence of Con H2SO4 at low temperature gives

• 1-Anthracenesulfonic acid
• 2-Anthracenesulfonic acid
• 4-Anthracenesulfonic acid
• 9-Anthracenesulfonic acid

Ans: 1-Anthracenesulfonic acid

13. Anthracene on oxidation in the presence of Na2Cr2O7 /Con H2SO4 gives

• 9,10 Anthraquinone
• 9,10 Dihydroanthracene
• 1,4 Anthraquinone
• 1,4 Dihydroanthracene

Ans: 9,10 Anthraquinone

14. Anthracene on reduction in presence of H2/Pd-C gives

• 9,10 Anthraquinone
• 9,10 Dihydroanthracene
• 1,4 Anthraquinone
• 1,4 Dihydroanthracene

Ans: 9,10 Dihydroanthracene

15. Starting materials for the synthesis of phenanthrene are

• Naphthalene & acetic anhydride
• Naphthalene & phthalic anhydride
• Naphthalene & succinic anhydride
• Naphthalene & benzene

Ans: Naphthalene & succinic anhydride

16. Friedel-crafts acylation of phenanthrene gives

• 1-acetylphenanthrene
• 4-acetylphenanthrene
• 9-acetylphenanthrene
• 10-acetylphenanthrene

Ans: 9-acetylphenanthrene

17. Anthracene undergoes electrophilic substitution reactions mainly at

• C-1
• C-2
• C-9
• C-1 and C-2

Ans: C-9

18. Anthracene undergoes oxidation with O2/V2O5 at 500°C to give

• Benzoic acid
• Anthraquinone
• Phthalic acid
• Benzophenone

Ans: Anthraquinone

19. Naphthalene undergoes reduction with H2 in the presence of Ni catalyst at
high temperature and pressure to give

• Phthalic acid
• Decalin
• Benzoic acid
• Tetralin

Ans: Decalin

20. Which of the following fractions of coal-tar distillation contains naphthalene?

• Light oil
• Middle oil
• Heavy oil
• Anthracene oil

Ans: Middle oil

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The content of mypharmaguide.com is provided for information and educational purposes only. We are not the owner of any PDF Material/Books/Notes/Articles published on this website. No claim is made as to the accuracy or authenticity of the PDF Material/Books/Notes/Articles of the website. In no event will this site or owner be liable for the accuracy of the information contained on this website or its use. mypharmaguide.com provides freely available PDF Material/Books/Notes/Articles on the Internet or other resources like Links etc. This site does not take any responsibility and legal obligations due to the illegal use and abuse of any information published on the website. No responsibility is taken for any information that may appear on any linked websites.

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Aromatic Amines MCQ with Answers of Pharmaceutical Organic Chemistry 2 B.Pharm 3rd Semester. All the Multiple Choice Questions and Answers share in this post are extremely helpful from an exam perspective so read and learn them all.

Aromatic Amines MCQ and Answers | Pharmaceutical Organic Chemistry 2 | B.Pharm 3rd Semester

1.Which of the following is a secondary amine

• Aniline
• N-Methylaniline
• N,N-Dimethylaniline
• Trimethylaniline

Ans: N-Methylaniline

2. Which of the following catalyst used to reduce the nitro group to an amine

• LiAlH4
• NaBH4
• Sn, HCl
• KMNO4

Ans: Sn, HCl

3. Benzaldehyde is converted to benzylamine by

• Reduction
• Reductive amination
• Oxidation
• Amination

Ans: Reductive amination

4. Hofmann’s degradation of amides gives

• Primary amine
• Secondary amine
• Tertiary amine
• Quaternary amine

Ans: Primary amine

5. Intermediate formed in Hofmann degradation is

• Isocyanate
• Isothiocyanate
• Imine
• Amine

Ans: Isocyanate

6. Hofmann’s elimination of quaternary ammonium salts give

• Alkane
• Alkene
• Alkyne
• Alkyl halide

Ans: Alkene

7. Reduced basicity of aniline is due to

• Larger resonance stabilisation of aniline
• Larger resonance stabilisation of its cojugate acid
• Resonance effect
• Inductive effect

Ans: Larger resonance stabilisation of aniline

8. Effect of halogens on the basicity of aniline

• Increases
• Decreases
• No effect
• Strongly increases

Ans: Decreases

9. 2-pentyltrimethyl ammonium ion by hofmann elimination gives____ as chief product

• 1-Pentene
• 2-Pentene
• 3-Pentene
• Both a) and B)

Ans: 1-Pentene

10. A reaction of N-methyl aniline with nitrous acid gives

• Diazonium salt
• N-Nitroso-N-methylaniline
• P-nitroso-N-methylaniline
• No reaction

Ans: N-Nitroso-N-methyl aniline

11. The amine ‘A’ when treated with nitrous acid gives a yellow oily substance. The amine A is

• Triethylamine
• Trimethylamine
• Aniline
• methylphenylamine

Ans: Aniline

12. The reaction of aniline with chloroform under alkaline conditions lead to the formation of

• Phenyl isonitrile
• Phenyl isocyanate
• Phenyl cyanate
• Phenyl cyanide

Ans: Phenyl cyanide

13. Which of the following statements about primary amines is ‘False‘?

• Alkyl amines are stronger bases than aryl amines
• Alkyl amines react with nitrous acid to produce alcohols
• Aryl amines react with nitrous acid to produce alcohols
• Alkyl amines are stronger bases than ammonia

Ans: Aryl amines react with nitrous acid to produce alcohols

14. Which of the following compound will not undergo azo coupling reaction with benzene diazonium chloride?

• Aniline
• Phenol
• Anisole
• Nitrobenzene

Ans: Nitrobenzene

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15. Aromatic amine are

• acidic in nature
• basic in nature
• neutral compounds
• amphoteric compounds

Ans: basic in nature

16. In the conversion of Benzene diazonium salt to Fluorobenzene, the catalyst used is

• HBF4
• KF
• Trifluoroacetic acid
• CuF

Ans: HBF4

17. In the conversion of o-toluidine to o-cresol, the catalyst used is

• NaNO2, H2SO4
• HNO3
• NaNO2
• NaNO2, KCl

Ans: NaNO2, H2SO4

18. Iodobenzene can be synthesized from aniline via….

• Grignard reagent
• Diazonium salt
• using KI
• Using Iodine

Ans: Diazonium salt

19. Which of the following statements is false about aniline?

• It is a primary aromatic amine.
• It is a weak base which forms salts with acids.
• It liberates nitrogen on treatment with ice-cold nitrous acid.
• It can be prepared by the reduction of nitrobenzene with tin and HCl.

Ans: It liberates nitrogen on treatment with ice-cold nitrous acid.

20. Rank the following compounds in order of increasing base strength :

• 1, 2, 3
• 3, 2, 1
• 2, 3, 1
• 2, 1, 3

Ans: 2, 3, 1

21. Which of the following compounds is most basic?

• Aniline
• Benzylamine
• Acetanilide
• p-nitroaniline

Ans: Benzylamine

22. Which of the following is least basic?

• Aniline
• p-Nitroaniline
• Ammonia
• Trimethylamine

Ans: p-Nitroaniline

23. Preparation of a diazonium salt from a primary aromatic amine is known as :

• Coupling reaction
• Sandmeyer reaction
• Diazotization
• Corey-House synthesis

Ans: Diazotization

24. The diazonium salts are the reaction products of the reaction of nitrous acid
with

• primary aliphatic amines
• primary aromatic amines
• secondary aliphatic amines
• secondary aromatic amines

Ans: primary aromatic amines

25. Which of the following statements is false about aniline?

• It is a primary aromatic amine.
• It is a primary aromatic amine.
• It liberates nitrogen on treatment with ice-cold nitrous acid.
• It can be prepared by the reduction of nitrobenzene with tin and HCl.

Ans: It liberates nitrogen on treatment with ice-cold nitrous acid.

26. Which of the following statements is correct about aniline?

• is weak acid.
• diazotizes to benzene diazonium chloride when treated with ice-cold nitrous acid
• can be nitrated with concentrated HNO3 to form p-nitroaniline.
• gives an intense green color with a suspension of bleaching powder in water

Ans: diazotizes to benzene diazonium chloride when treated with ice-cold nitrous acid

27. Which of the following statements is false about benzylamine?

• can be prepared by reduction of benzonitrile with LiAlH4.
• cannot be prepared by reduction of benzamide with LiAlH4.
• reacts with nitrous acid to give benzyl alcohol.
• reacts with KMnO4 to give benzoic acid.

Ans: cannot be prepared by reduction of benzamide with LiAlH4.

28. Aniline is prepared by

• the reaction of benzene with ammonia
• the reduction of nitrobenzene with Sn/HCl
• the dehydrogenation of nitrobenzene
• the reaction of nitrobenzene with I2/NaOH

Ans: the reduction of nitrobenzene with Sn/HCl

29. Aniline reacts with bromine water to form

• Bromobenzene
• m-Bromoaniline
• 2,4,6-Tribromoaniline
• o- plus p-Bromoaniline

Ans: 2,4,6-Tribromoaniline

30. Which of the following reagents does not react with aniline?

• Acetyl chloride
• Acetic anhydride
• Ammonia
• Nitrous acid

Ans: Ammonia

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The content of mypharmaguide.com is provided for information and educational purposes only. We are not the owner of any PDF Material/Books/Notes/Articles published on this website. No claim is made as to the accuracy or authenticity of the PDF Material/Books/Notes/Articles of the website. In no event will this site or owner be liable for the accuracy of the information contained on this website or its use. mypharmaguide.com provides freely available PDF Material/Books/Notes/Articles on the Internet or other resources like Links etc. This site does not take any responsibility and legal obligations due to the illegal use and abuse of any information published on the website. No responsibility is taken for any information that may appear on any linked websites.

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Phenols MCQ with Answers of Pharmaceutical Organic Chemistry 2 B.Pharm 3rd Semester. All the Multiple Choice Questions and Answers share in this post are extremely helpful from an exam perspective so read and learn them all.

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Phenols MCQ with Answers | Pharmaceutical Organic Chemistry 2 | B.Pharm 3rd Semester

1. Phenol can be converted to p- & o Hydroxyphenyl ethyl ketone by

• Riemen-Tiemann reaction
• Fries rearrangement
• Claisens rearrangement
• Kolbe reaction

Ans: Fries rearrangement

2. Phenol can be converted into salicylaldehyde by

• Riemen-Tiemann reaction
• Fries rearrangement
• Claisens rearrangement
• Kolbe reaction

Ans: Riemen-Tiemann reaction

3. Benzyl Phenyl ether is obtained from benzyl bromide and phenol in the presence of a catalyst

• Con HCl
• Con H2SO4
• Aq HNO3
• aq. NaOH

Ans: aq. NaOH

4. Which of the following is O-hydroxy phenol

• Catechol
• Resorcinol
• Hydroquinone
• Cresol

Ans: Catechol

5. Which of the following is p-hydroxy phenol

• Catechol
• Resorcinol
• Hydroquinone
• Cresol

Ans: Hydroquinone

6. Which of the following is m-hydroxy phenol

• Catechol
• Resorcinol
• Hydroquinone
• Cresol

Ans: Resorcinol

7. Which of the following is 3-methyl phenol

• Catechol
• Resorcinol
• Hydroquinone
• Cresol

Ans: Cresol

8. Phenol is soluble in

• Aq NaOH
• Aq NaHCO3
• Aq HCl
• None

Ans: Aq NaOH

9. Anisole can be synthesised from phenol using

• Methyl sulfate and NaOH
• Methyl sulfate and HCl
• Methyl acetate and NaOH
• Methyl acetate and HCl

Ans: Methyl sulfate and NaOH

10. Phenol on distillation with Zinc dust gives

• Phenylzinc
• Benzene
• Cyclohexanone
• Benzoic acid

Ans: Benzene

11. Phenol is an ortho-para director because the hydroxyl group :

• donates electrons that increase electron density at ortho and para positions favouring nucleophilic attack
• donates electrons that increase electron density at ortho and para positions favoring electrophilic attack.
• donates electrons to the ortho and para positions and attracts electrons away from meta positions favoring nucleophilic attack of the ring.
• donates electrons to the ortho and para positions and attracts electrons away from meta positions favoring electrophilic attack on the ring.

Ans: donates electrons that increase electron density at ortho and para positions favoring electrophilic attack.

12. Hydrolysis of benzal chloride gives

• Phenol
• Benzaldehyde
• Benzyl alcohol
• Benzoyl chloride

Ans: Benzaldehyde

13. Benzenediazonium chloride reacts with warm water to give

• Aniline
• Phenol
• Benzene
• Chlorobenzene

Ans: Phenol

14. Benzenediazonium chloride reacts with phenol to form :

• p-chlorophenol
• Chlorobenzene
• p-Hydroxyazobenzene
• DDT

Ans: p-Hydroxyazobenzene

15. Phenol is used

• in alcoholic beverages
• as anesthetic
• in antiseptics
• as moth repellant

Ans: in antiseptics

16. When phenol is treated with neutral FeCl3 solution, it develops

• Violet color
• Yellow color
• Green color
• None of the above

Ans: Violet color

17. Which of the following compounds will react with PCl5 least vigorously?

• Ethanol
• Acetic acid
• Phenol
• Benzoic acid

Ans: Phenol

18. Phenol reacts with excess bromine water to give

• o- plus p-Bromophenol
• Bromobenzene
• 2,4,6-Tribromophenol
• m-Bromophenol

Ans: 2,4,6-Tribromophenol

19. Anisole is formed when phenol is treated with

• CH3I/NaOH
• CH3CH2I/NaOH
• CHCl3/NaOH
• Acetic anhydride

Ans: CH3I/NaOH

20. Anisole on heating with concentrated HI gives

• Iodobenzene
• Phenol + CH3I
• Iodobenzene + CH3OH
• Phenol + CH3OH

Ans: Phenol + CH3I

21. Which group forms the strongest H-bonds to water molecules?

• Alcohols
• Ethers
• Phenols
• All of the above

Ans: Phenols

22. Which of the following compounds will react with PCl5 least vigorously?

• Ethanol
• Acetic acid
• Phenol
• Benzoic acid

Ans: Phenol

23. When phenol is treated with neutral FeCl3 solution, it develops

• Violet color
• Yellow color
• Green color
• None of the above

Ans: Violet Colour

24. Phenol is acidic because of

• Resonance
• Electromeric effect
• Inductive effect
• Peroxide effect

Ans: Resonance

25. Which of the following has the most acidic proton?

• Thiol
• Alcohol
• Phenol
• Ether

Ans: Phenol

26. Phenol is

• stronger acid than acetic acid
• weaker acid than acetic acid
• stronger base than methylamine
• weaker base than methylamine

Ans: weaker acid than acetic acid

27. Which of the following compounds is most acidic?

• o-Cresol
• p-Nitrophenol
• p-Cresol
• p-Chlorophenol

Ans: p-Nitrophenol

28. Which of the following compounds is most acidic?

• Phenol
• m-Nitrophenol
• m-Cresol
• m-Bromophenol

Ans: m-Nitrophenol

29. Phenols can be easily distinguished from alcohols because

• phenols are soluble in NaOH, but alcohols are not
• alcohols are soluble in NaOH, but phenols are not
• phenols are soluble in NaHCO3, but alcohols are not
• alcohols are soluble in NaHCO3, but phenols are not

Ans: phenols are soluble in NaOH, but alcohols are not

30. Which of the following statements is true :

• o-Nitrobenzoic acid is more acidic than p-nitrophenol
• o-Nitrobenzoic acid is less acidic than p-nitrophenol
• o-Nitrobenzoic acid and p-nitrobenzoic acid have the same acid strength
• None of these

Ans: o-Nitrobenzoic acid is more acidic than p-nitrophenol

31. Bakelite is obtained from :

• Phenol and formaldehyde
• Adipic acid and hexamethylene diamine
• Dimethyl terephthalate and ethylene glycol
• Neoprene

Ans: Phenol and formaldehyde

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The content of mypharmaguide.com is provided for information and educational purposes only. We are not the owner of any PDF Material/Books/Notes/Articles published on this website. No claim is made as to the accuracy or authenticity of the PDF Material/Books/Notes/Articles of the website. In no event will this site or owner be liable for the accuracy of the information contained on this website or its use. mypharmaguide.com provides freely available PDF Material/Books/Notes/Articles on the Internet or other resources like Links etc. This site does not take any responsibility and legal obligations due to the illegal use and abuse of any information published on the website. No responsibility is taken for any information that may appear on any linked websites.

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Aromatic Acids MCQ and Answers of Pharmaceutical Organic Chemistry 2 B.Pharm 3rd Semester. All the Multiple Choice Questions and Answers share in this post are extremely helpful from an exam perspective so read and learn them all.

1. Alcohols can be converted into carboxylic acids by

• oxidation
• Reduction
• Hydrolysis
• Eliminatione

Ans: oxidation

2. Alkyl halides can be converted into carboxylic acid by

• oxidation
• Reduction
• via grignard reagent
• Hydrolysis

Ans: via grignard reagent

3. Carboxylic acids can be converted into primary alcohol by

• Oxidation using KMNO4
• Reduction using LiAlH4
• Hydrolysis using NaOH
• Ester formation

Ans: Reduction using LiAlH4

4. Carboxylic acids are more acidic than alcohols due to

• Resonance stabilization of conjugate base of acid is small
• Resonance stabilization of conjugate base of acid is large
• Resonance stabilization of acid is small
• Resonance stabilization of acid is large

Ans: Resonance stabilization of conjugate base of acid is large

5. Effect of the ortho-OCH3 group on the acidity of benzoic acid

• Increases
• Decreases
• No effect
• Strongly increases

Ans: Decreases

6. Effect of the ortho-NO2 group on the acidity of benzoic acid

• Increases
• Decreases
• No effect
• Strongly increases

Ans: Increases

7. Phenol can be converted to p- & o Hydroxyphenyl ethyl ketone by

• Riemen-Tiemann reaction
• Fries rearrangement
• Claisens rearrangement
• Kolbe reaction

Ans: Fries rearrangement

8. Carbonation of Grignard reagent leads to the synthesis of

• Alkyl halide
• Carboxylic acid
• Aldehyde
• Ketone

Ans: Carboxylic acid

9. Acyl chloride can be synthesised from carboxylic acid using

• HCl
• NaCl
• SOCl2
• KCl

Ans: SOCl2

More Aromatic Acids MCQ and Answers will be soon….

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Benzene and its Derivatives MCQ and Answers of Pharmaceutical Organic Chemistry 2 B.Pharm 2nd Semester. All the Multiple Choice Questions and Answers share in this post are extremely helpful from an exam perspective so read and learn them all.

1. The molecule must have ______ π electrons to be
aromatic compound

• 2n+2
• 4n+2
• 6n+2
• 8n+2

Ans: 4n+2

2. Cyclopentadienyl cation is

• Aromatic
• Not aromatic
• Contains Five π electrons
• Heterocycle

Ans: Aromatic

3. Electrophiles are

• Rich in electrons
• Neutral
• More affinity to nucleas
• Less affinity to nucleas

Ans: More affinity to nucleas

4. Catalyst used in Friedel-crafts alkylation is

• Ammonium chloride
• Aluminium chloride
• Calcium chloride
• Sodium chloride

Ans: Aluminium chloride

5. Kolbe reaction is a characteristic reaction for

• Carboxylic acids
• Amines
• Phenols
• Alcohols

Ans: Phenols

6. Reimer-Tiemann reaction is a characteristic reaction for

• Carboxylic acids
• Amines
• Phenols
• Alcohols

Ans: Phenols

7. Which of the following is a weakly activating group

• -F
• -Br
• -NH2
• -C2H5

Ans: -C2H5

8. In the mechanism of electrophilic aromatic substitution reaction, intermediate formed is

• Carbocation
• Carbanion
• Neutral
• Basic

Ans: Carbocation

9. In the mechanism of electrophilic aromatic substitution reaction

• Ist step is rate determining step
• IInd step is slow step
• IInd step is rate determining step
• Ist step is Fast step

Ans: 1st Step is the rate-determining step

10. Electron releasing group in an electrophilic aromatic substitution reaction

• Stabilizes Carbocation
• Destabilizes Carbocation
• Deactivates ring
• Do not have any effect

Ans: Stabilizes Carbocation

11. Chloro group is

• Electron withdrawing by resonance effect
• Electron withdrawing by inductive effect
• Electron withdrawing by both inductive and resonance effect
• Electron donating by both inductive and resonance effect

Ans: Electron withdrawing by inductive effect

12. Toluene undergoes electrophilic aromatic substitution reaction to give

• Only para substituted product
• Only ortho substituted product
• Both para and ortho substituted product
• Meta substituted product

Ans: Both para and ortho substituted product

13. Nitrobenzene undergoes an electrophilic aromatic substitution reaction to give

• Only para substituted product
• Only ortho substituted product
• Both para and ortho substituted product
• Meta substituted product

Ans: Meta substituted product

14. Chlorobenzene undergoes electrophilic aromatic substitution reaction to give

• Only para substituted product
• Only ortho substituted product
• Both para and ortho substituted product
• Meta substituted product

Ans: Both para and ortho substituted product

15. In the case of carbocation intermediate in electrophilic aromatic substitution of aniline, stable resonance structure has

• Pentet electrons
• hextet electrons
• heptet electrons
• octet electrons

Ans: octet electrons

16. Iodobenzene undergoes the electrophilic aromatic substitution reaction to give

• Only para substituted product
• Only ortho substituted product
• Both para and ortho substituted product
• Meta substituted product

Ans: Both para and ortho substituted product

17. Protonated dimethylaniline undergoes the electrophilic aromatic substitution reaction to give

• Only para substituted product
• Only ortho substituted product
• Both para and ortho substituted product
• Meta substituted product

Ans: Meta substituted product

18. Benzaldehyde undergoes nitration reaction to give

• Only para substituted product
• Only ortho substituted product
• Both para and ortho substituted product
• Meta substituted product

Ans: Meta substituted product

19. Acetanilide undergoes nitration reaction to give

• Only para substituted product
• Only ortho substituted product
• Both para and ortho substituted product
• Meta substituted product

Ans: Both para and ortho substituted product

20. 4- methyl acetanilide undergoes bromination gives chief product i.e.,

• 2-bromo-4- methyl acetanilide
• 3-bromo-4- methyl acetanilide
• 5-bromo-4- methyl acetanilide
• 2,3-dibromo-4- methyl acetanilide

Ans: 2-bromo-4- methyl acetanilide

21. 4-hydroxy toluene on nitration gives ____ as chief product

• 2-Nitro-4-hydroxy toluene
• 3-Nitro-4-hydroxy toluene
• 2,6-Dinitro-4-hydroxy toluene
• 3,5-Dinitro-4-hydroxy toluene

Ans: 3-Nitro-4-hydroxy toluene

22. What is the name of C6H5-CH2 group?

• aryl
• arenyl
• benzyl
• phenyl

Ans: benzyl

23. Which will not result in a reaction?

• C6H5OH + Br2
• C6H5OH + NaOH
• C6H5OH + Na2CO3
• C6H5OH + HNO3/H2SO4

Ans: C6H5OH + Na2CO3

24. Which of the following represents the best reagent(s) for the electrophilic nitration of benzene?

• NO2
• HNO2
• HNO3
• H2SO4, HNO3

Ans: H2SO4, HNO3

25. Predict the major product when nitrobenzene reacts with methyl chloride in the presence of aluminium chloride

• nitrobenzene
• o-nitrotoluene and p-nitrotoluene
• m-nitrotoluene
• chlorobenzene

Ans: m-nitrotoluene

26. Predict the major product when toluene reacts with methyl chloride in the presence of aluminium chloride

• o-chlorotoluene and p-chlorotoluene
• m-chlorotoluene
• o-dimethylbenzene and p-dimethylbenzene
• m-dimethylbenzene

Ans: o-dimethylbenzene and p-dimethylbenzene

27. Aldehyde group in benzaldehyde is

• ortho and para directing
• meta directing
• para directing
• ortho directing

Ans: meta directing

28. Bromine group in bromobenzene is

• ortho and para directing
• meta directing
• para directing
• ortho directing

Ans: ortho and para directing

29. Which of the following statements is incorrect for aromatic compounds

• Are planar
• Have 4n+2 π-electrons
• Have 4n π-electrons
• Are cyclic

Ans: Have 4n π-electrons

30. When considering electrophilic aromatic substitution reactions electron-donating
substituents (e.g. methoxy) are described as

• ortho/para directing and activating
• ortho/para directing and deactivating
• meta directing and activating
• meta directing and deactivating

Ans: ortho/para directing and activating

31. How many pairs of degenerate π molecular orbitals are found in benzene?

• 6
• 5
• 4
• 2

Ans: 2

32. Chemically DDT is

• dichlorodiphenyltrichloroethane
• dichloroethane
• trichloroethane
• dichloropropane
• trichlorobutane

Ans: dichlorodiphenyltrichloroethane

33. Saccharine is a derivative of

• benzothiazole
• benzotriazole
• benzimidazole
• benzoxazole

Ans: benzothiazole

34. Chloramine is used as

• preservative
• artificial sweetener
• disinfectant
• flavouring agent

Ans: disinfectant

35. Saccharine is used as

• preservative
• artificial sweetener
• flavouring agent
• colouring agent

Ans: artificial sweetener

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