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Organic Chemistry Multiple Choice Questions and Answers – Reaction Mechanism of Organic Compounds

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Free download in PDF Organic Chemistry Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams like UPSC, NDA, SSC etc. These short solved questions or quizzes are provided by Gkseries./p>

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(1) Why are aryl halides less reactive towards nucleophilic substitution reactions as compared to alkyl halides?
[A] The formation of a less stable carbanion
[B] Longer carbon halogen bond
[C] The inductive effect
[D] Sp2-hybridized carbon attached to the halogen
Answer: Sp2-hybridized carbon attached to the halogen
(2) What will be the (X) in the below mentioned reaction sequence?

[A]
[B]
[C]
[D]
Answer: (a)

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(3) In the following reaction sequence, what will be X?

[A] Benzoic acid
[B] Salicylic acid
[C] Phenol
[D] Aniline
Answer: Aniline
(4) Which of the following is not true for SN1 reactions?
[A] They occur through a single step concerted reaction
[B] They are favoured by polar solvents
[C] Tertiary alkyl halides generally react through this mechanism
[D] Concentration of nucleophile does not affect the rate of such reactions
Answer: They occur through a single step concerted reaction
(5) What is not true about below reaction?

[A] Major product is given by SN1 reaction
[B] Through E1 mechanism 3 alkenes are formed
[C] 3-Methylpentane-3-ol is also formed as one of the product
[D] Fractional distillation of elimination product will give two fractions
Answer: Fractional distillation of elimination product will give two fractions
(6) What will be the total number of isomers formed when 2-methyl butane is subjected to monochlorination?
[A] 5
[B] 4
[C] 3
[D] 6
Answer: 6
(7) The number of substitution products formed when metabromo anisole is treated with KNH2/NH3?
[A] 1
[B] 2
[C] 3
[D] 4
Answer: 3
(8) How many number of pie e- is present in benzene?
[A] 6
[B] 7
[C] 8
[D] 9
Answer: 7
(9) What will be the final product in the below reaction?

[A] (a)
[B] (b)
[C] (c)
[D] (d)
Answer: (a)
(10) Which of the following structures represent the correct major product for the below reaction?

[A] (a)
[B] (b)
[C] (c)
[D] (d)
Answer: (c)

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