III B.Sc Organic Chemistry I Quiz

Which one of the following compounds is optically active?

• CHCl₃  

• CH₂Cl₂  

• CHFClBr   

• CCl₄

Which notation system is used to designate absolute configuration?

• D, L

• E, Z

• R, S

• (+), (-)

Choose the correct option for the following compound:

• Chiral due to the presence of asymmetric carbon atom

• Achiral due to plane of symmetry

• Achiral due to center of symmetry

• Chiral due to restricted rotation

Which of the following representation provides a three-dimensional representation?

• Fischer projection representation

• Sawhorse representation

• Newman representation

• Flying Wedge representation

Point out the highest priority group according to Cahn-Ingold-Prelog sequence rules.

•      -CH₃ 

• -CH₂Cl  

• -CH₂OH 

• -CHO

Identify the process which converts a racemic mixture into its enantiomers.

• Racemisation   

• Resolution  

• Walden inversion  

• Asymmetric synthesis

Identify the optically active compound.

• Maleic acid

• Lactic acid

• Meso-tartaric acid

• Fumaric acid

Which of the following represents a pair of enantiomers?

• (R)-2-chlorobutane and (R)-2-chlorobutane

• (R)-2-chlorobutane and (S)-2-chlorobutane

• (R)-2-chlorobutane and (R)-2-chloro-2-methylpropane

• (R)-2-chlorobutane and (S)-2-chloro-2-methylpropane

(+)-menthol produce a strong cooling effect and desirable aroma. Say true or false

• True

• False

Which of the following device is used to measure optical activity?

• Lactometer

• Polarimeter

• Sisco meter

• Photocalorimeter