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Organic Chemistry Questions and Answers – Stereoisomers | Organic Chemistry Multiple Choice Questions and Answers

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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) What is the complete IUPAC name of the following substance?

[A] (1S,3S)-1-methylcyclopentane-1,3-diol
[B] (1R,3R)-1-methylcyclopentane-1,3-diol
[C] (1S,3R)-1-methylcyclopentane-1,3-diol
[D] (1R,3S)-1-methylcyclopentane-1,3-diol
Answer: (1R,3S)-1-methylcyclopentane-1,3-diol
(2) How many stereoisomers are there for the following structure?

[A] 1
[B] 2
[C] 3
[D] 4
Answer: 3

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(3) How many stereoisomers of 3-bromo-2-butanol, CH3CH(OH)CHBrCH3, exist?
[A] 3
[B] 1
[C] 2
[D] 4
Answer: 4
(4) How many stereoisomers of 2,3-butanediol, CH3CH(OH)CH(OH)CH3, exist?
[A] 3
[B] 4
[C] 1
[D] 2
Answer: 3
(5) What is the complete IUPAC name of the following stereoisomer?

[A] (1S)-2-ethyl-3,3-dimethylcyclopentane
[B] (1R)-2-ethyl-3,3-dimethylcyclopentane
[C] (1S)-1-ethyl-,3,3-diimethylcyclopentane
[D] (1S)-3-ethyl-1,1-diimethylcyclopentane
Answer: (1S)-1-ethyl-,3,3-diimethylcyclopentane
(6) Which of the following structures represent the same stereoisomer?

[A] Only 1 and 2
[B] Only 2 and 3
[C] 1, 2 and 3
[D] Only 3 and 1
Answer: Only 2 and 3
(7) Which of the following compounds can exhibit geometrical isomerism?
[A] 1-Hexene
[B] 2-Methyl-2-Pentene
[C] 3-methyl-1-pentene
[D] 2-Hexene
Answer: 2-Hexene
(8) How many number of stereoisomers possible for 2, 3-pentanediol?
[A] 3
[B] 4
[C] 5
[D] 6
Answer: 4
(9) How many chiral stereoisomers can be drawn for CH3CHFCHFCH(CH3)2?
[A] 4
[B] 5
[C] 6
[D] 7
Answer: 4
(10) What is the total number of isomers, stereoisomers included, designated by the dichlorocyclopentane?
[A] 7
[B] 6
[C] 4
[D] 5
Answer: 7

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