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Organic Chemistry

243 MCQ questions with answers and explanations · page 1 of 10

Test yourself▶ 25 question test▶ 50 question test

Q1. Which chemist propounded the theory of vitality?

  1. ABerzelius
  2. BWöhler
  3. CKolbe
  4. DBerthelot
Show answer & explanation

Answer: A) Berzelius

Q2. The first organic compound synthesized in the laboratory was

  1. Alactic acid
  2. Bglucose
  3. CUrea
  4. Duric acid
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Answer: C) Urea

Q3. In organic compounds, all the four valencies of the carbon atom are directed towards the four edges of a rhombohedron and carbon is at the centre – who first gave this idea?

  1. AJ. J. Thomson
  2. BAlbert Einstein
  3. CMichael Faraday
  4. DLeibel and Van't Hoff
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Answer: D) Leibel and Van't Hoff

Q4. The most abundant organic compound found in nature is—

  1. Aglucose
  2. BFructose
  3. CSukoz
  4. DCellulose
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Answer: D) Cellulose

Q5. Which of the following elements is found in all organic compounds?

  1. ACarbon
  2. Bcalcium
  3. Cnitrogen
  4. Doxygen
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Answer: A) Carbon

Q6. By which method is camphor purified?

  1. Asublimation
  2. Bdistillation
  3. Cchromatography
  4. Dvacuum distillation
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Answer: A) sublimation

Q7. Which method is used for the purification of aniline?

  1. Asteam discharge
  2. Bpartial secretion
  3. Cvacuum discharge
  4. Dsublimation
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Answer: A) steam discharge

Q8. The IUPAC name of the organic compound CH2 OH is ____

  1. Amethanol
  2. BMethanal
  3. Cmethyl alcohol
  4. Dhydroxy methane
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Answer: A) methanol

Q9. The IUPAC name of 'ethylene' is_

  1. Aethene
  2. BEthyne
  3. CPropene
  4. DPropine
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Answer: A) ethene

Q10. The IUPAC name of acetylene is ____.

  1. Aethene
  2. BEthyne
  3. CPropine
  4. Dbutyne-2
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Answer: B) Ethyne

Q11. The name of C²H⁵OH according to IUPAC system is

  1. AEthanal
  2. BEthanol
  3. CPropanone
  4. DEthyne
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Answer: B) Ethanol

Q12. The IUPAC name of 'chloroform' is_

  1. Atrichloromethane
  2. Btetrachloromethane
  3. Ctrichloroethane
  4. DHexachloro Ethane
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Answer: A) trichloromethane

Q13. The IUPAC name of 'Chloral' is_

  1. AEthanol
  2. Bmonochloro ethanol
  3. CDichloro ethanol
  4. Dtrichloroethanol
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Answer: D) trichloroethanol

Q14. Which of the following is an organic compound?

  1. AWater
  2. Bsodium chloride
  3. Cchloroform
  4. Dammonium chloride
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Answer: C) chloroform

Q15. Phenol is a ……compound.

  1. Aaliphatic
  2. BAromatic
  3. Calicyclic
  4. Dheterocyclic
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Answer: B) Aromatic

Q16. The reactive radical found in alcohol is ____

  1. A—O—
  2. BC=O
  3. C—CHO
  4. D—OH
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Answer: D) —OH

Q17. The reactive radical found in aldehyde is-

  1. A—OH
  2. B—CHO
  3. CC=O
  4. D—COOH
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Answer: B) —CHO

Q18. Which reactive radical is present in ketone?

  1. A—CHO
  2. B—COOH
  3. CC=O
  4. D—OH
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Answer: D) —OH

Q19. The reactive radical present in carboxylic acid is-

  1. A—CHO
  2. B—COOH
  3. CC=O
  4. D—COOR
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Answer: B) —COOH

Q20. The group that imparts chemical properties to an organic compound is called_

  1. Afunctional group
  2. Bfunctional group
  3. CIndifferent groups
  4. DDefunct groups
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Answer: C) Indifferent groups

Q21. How much difference does any member of a homologous series show from the molecular formula of the next and previous member?

  1. ACH₂
  2. BCH⁴
  3. CC²H⁴
  4. DC²H⁶
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Answer: B) CH⁴

Q22. Which of the following is 'Homologous'?

  1. ACH⁴ and C² H⁴
  2. BC²H² and C⁶H⁶
  3. CC²H⁵, OH and CH³OCH³
  4. DCH⁴ and C²H⁶
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Answer: A) CH⁴ and C² H⁴

Q23. The homolog of methyl alcohol is ____

  1. Aethyl alcohol
  2. Bnormal propyl alcohol
  3. Cisopropyl alcohol
  4. Dformaldehyde
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Answer: A) ethyl alcohol

Q24. Which statement is not correct regarding 'homogeneous series'?

  1. AAll members of a homologous series can be expressed by a single general formula
  2. BAny member of a homologous series shows a difference of —CH² from the molecular formula of the next and previous member.
  3. CAll members of a homologous series show similar chemical properties.
  4. DThere is no gradual change in the physical properties of the members of a homologous series
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Answer: A) All members of a homologous series can be expressed by a single general formula

Q25. The empirical formula of acetylene is-

  1. ACH
  2. BCH²
  3. CCH⁴
  4. DC²H²
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Answer: D) C²H²

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