Quiz  /  Stereochemistry Gate & PSU MCQ Questions With Answers

  • 1. 
    How could the following molecule be created from benzene?

  • 1) CH3Cl/AlCl3 ; 2) Cl2/FeCl3
  • 1) CH3Cl/AlCl3
  • 1) CH3Cl/AlCl3 ; 2) Br2/FeBr3
  • 1) CH3Br/AlBr3 ; 2) Br2/FeBr3

  • 2. 
    Which number of pi electrons satisfies Huckel's rule. Check all that apply

  • 3
  • 4
  • 6
  • 8

  • 3. 
    Which of the substituents are ranked as the lowest priority based on Cahn-Ingold-Prelog ranking rules?

  • -C(O)H
  • -CH2OH
  • -CH2-O-C(O)CH3

  • 4. 
    The compound is ____________________ .

  • aromatic
  • not aromatic

  • 5. 
    Which of these conformation has the substitute in the axial position?

  • The one to the left
  • the one to the right

  • 6. 
    Identify the incorrect statement regarding aromaticity.

  • does not follow Huckel’s rule
  • Cyclic delocalization takes place
  • p-orbitals must be planar and overlap
  • It is the extra stability possessed by a molecule

  • 7. 
    Name this compound

  • m-aminochlorobenzene
  • m-chloroaniline
  • o-chloroaniline
  • 1-chloro-3-aminobenzene

  • 8. 
    Optical isomers are of how many types

  • 2
  • 3
  • 4
  • 5

  • 9. 
    Which of the substituents are ranked as the highest priority based on Cahn-Ingold-Prelog ranking rules?

  • -OH
  • -CH2CH3
  • -H2PO4

  • 10. 
    Number of stereoisomers of camphor is

  • 2
  • 3
  • 4
  • 1

  • 11. 
    What is the relationship between 2 and 3?

  • diastereoisomers
  • enantiomers
  • no relationship
  • meso compounds

  • 12. 
    Number of Pi bonds in benzene are

  • 4
  • 3
  • 2
  • 1

  • 13. 
    THE ENERGY DIFFERENCE BETWEEN BOAT AND CHAIE CONFORMATION OF CYCLOHEXANE IS____________ KCAL/MOLE

  • 11.2
  • 7.1
  • 1.7
  • 5.2

  • 14. 
    Give the absolute configuration on the labelled chiral carbon in 2,N,N-trimethyl-3-hexanamine

  • S
  • R
  • trans
  • cis

  • 15. 
    How many total stereoisomers are possible for this molecule, and why?

  • 4 stereoisomers, because there are 2 stereocenters.
  • 4 stereoisomers, because there are 2 enantiomer pairs.
  • 3 stereoisomers, because their are 2 stereocenters.
  • 3 stereoisomers, because the molecule shown is a meso compound.

  • 16. 
    Give the correct absolute configuration of this molecule

  • (1R, 2S)-2-isopropylcyclohexanol
  • (1R,2R)-2-isopropylcyclohexanol
  • (1S,2R)-2-isopropylcyclohexanol
  • (1S,2S)-2-isopropylcyclohexanol

  • 17. 
    What is the relationship between 3 and 4?

  • diastereoisomers
  • enantiomers
  • no relationship
  • meso compounds

  • 18. 
    Molecule shown below is in

  • E isomer
  • Z isomer
  • Trans isomer
  • Cis isomer

  • 19. 
    CYCLOPROPANE HAS MAXIMUM ___________ STRAIN

  • ANGLE
  • VAN DER WAALS
  • PITZER
  • TRANSANNULAR

  • 20. 
    Which of the substituents are ranked as the lowest based Cahn-Ingold-Prelog ranking rules?

  • -NH2
  • -C≡N
  • -NO2

  • 21. 
    NAPHTHALENE CONSIST OF __________ ANULAR POSITIONS.

  • ONE
  • TWO
  • THREE
  • NONE OF THE ABOVE
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