unit-i poc-iii

Stereoisomers have the same molecular formula and:

• Different molecular masses

• Different structural formulas

• Same connectivity but different spatial arrangement

• Different functional groups

Which of the following is not a type of stereoisomerism?

• Chain isomerism

• Optical isomerism

• Geometrical isomerism

• Enantiomerism

Compounds that are non-superimposable mirror images are called:

• Diastereomers

• Meso compounds

• Enantiomers

• Conformers

A chiral molecule must lack:

• A carbon atom

• Optical activity

• A plane of symmetry

• A polar bond

Which of the following is a property of enantiomers?

• Identical melting points and boiling points

• Same specific rotation

• Same direction of optical rotation

• Different molecular formulas

Which of the following does not exhibit optical activity?

• Chiral molecules

• Racemic mixture

• Enantiomers

• Compounds with asymmetric carbon

A meso compound is:

• Optically active

• Chiral

• Achiral with chiral centers

• Always racemic

Diastereomers differ in configuration at:

• All chiral centers

• No chiral center

• Some but not all chiral centers

• One chiral center only

Which statement is true for enantiomers?

• They are superimposable

• They have different physical properties

• They rotate plane-polarized light in opposite directions

• They are the same compound

Which of the following is a chiral molecule?

• CH₃CH₂OH

• CH₃CHBrCH₃

• CH₃CH(OH)CH₃

• CH₃CH(Br)CH₃