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STEREOCHEMISTRY MCQs

Total Questions : 21 | Page 2 of 3 pages
Question 11. Choose the correct statement(s) for aromatic compounds
  1.    They are cyclic and planer
  2.    They have \pi π delocalized electrons
  3.    They have conjugated double bonds
  4.    All of above
 Discuss Question
Answer: Option D. -> All of above
Question 12. WHICH ONE IS THE MOST STABLE FORM OF CYCLOHEXANE?
  1.    CHAIR
  2.    BOAT
  3.    TWIST BOAT
  4.    HALF CHAIR
 Discuss Question
Answer: Option A. -> CHAIR
Question 13. Which of the following alkanes would you expect to have the lowest melting point?
  1.    octane
  2.    propane
  3.    pentane
  4.    butane
 Discuss Question
Answer: Option B. -> propane
Question 14. Which of the substituents are ranked as the lowest based Cahn-Ingold-Prelog ranking rules?
  1.    -NH2
  2.    -C≡N
  3.    -NO2
  4.    none of these
 Discuss Question
Answer: Option B. -> -C≡N
Question 15. Which of the substituents are ranked as the highest priority based on Cahn-Ingold-Prelog ranking rules?
  1.    -OH
  2.    -CH2CH3
  3.    -H2PO4
  4.    all of the above
 Discuss Question
Answer: Option C. -> -H2PO4
Question 16. Which of the substituents are ranked as the lowest priority based on Cahn-Ingold-Prelog ranking rules?
  1.    -C(O)H
  2.    -CH2OH
  3.    -CH2-O-C(O)CH3
  4.    none of these
 Discuss Question
Answer: Option B. -> -CH2OH
Question 17. Identify the incorrect statement regarding aromaticity
  1.    does not follow Huckel’s rule
  2.    Cyclic delocalization takes place
  3.    p-orbitals must be planar and overlap
  4.    It is the extra stability possessed by a molecule
 Discuss Question
Answer: Option A. -> does not follow Huckel’s rule
Question 18. ACCORDING TO BAYER STRAIN THEORY _______________ CYCLOALKANE IS MOST STABLE
  1.    CYCLOPROPANE
  2.    CYCLOHEXANE
  3.    CYCLOPENTANE
  4.    CYCLOBUTANE
 Discuss Question
Answer: Option C. -> CYCLOPENTANE
Question 19. Which number of pi electrons satisfies Huckel's rule
  1.    3
  2.    4
  3.    6
  4.    8
 Discuss Question
Answer: Option C. -> 6
Question 20. The maximum number of stereoisomers possible for 4-phenyl but-3-en-2ol is
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option D. -> 4

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