Stereochemistry: Online Learning Quizzes for Mechanical Engineering Students

Question 1

Identify the group with the highest priority according to the Cahn-Ingold-Prelog (CIP) rules.

Accepted Answer

-COOH

Answer

-OH

Answer

-NH2

Answer

-CH3

Question 2

Describe the hybridization of the carbon atom in a tetrahedral chiral center.

Accepted Answer

sp3

Answer

sp

Answer

sp2

Answer

sp3d

Question 3

Define diastereomers.

Accepted Answer

Diastereomers are stereoisomers that are not mirror images of each other and have different physical properties.

Answer

Diastereomers are stereoisomers that are mirror images of each other and have different physical properties.

Answer

Diastereomers are stereoisomers that are not mirror images of each other and have identical physical properties.

Answer

Diastereomers are stereoisomers that are mirror images of each other and have identical physical properties.

Question 4

What is the central focus of stereochemistry?

Accepted Answer

The three-dimensional arrangement of molecules

Answer

The chemical reactions involving molecules

Answer

The physical characteristics of molecules

Answer

The biological functions of molecules

Question 5

Which of the following is not a type of isomerism?

Accepted Answer

Metameric isomerism

Answer

Structural isomerism

Answer

Stereoisomerism

Answer

Optical isomerism

Question 6

Which of the following techniques is used to determine the absolute configuration of a chiral molecule?

Accepted Answer

X-ray crystallography

Answer

NMR spectroscopy

Answer

Mass spectrometry

Answer

IR spectroscopy

Question 7

Which of the following is an example of a racemic mixture?

Accepted Answer

A mixture of equal amounts of two enantiomers

Answer

A mixture of different stereoisomers

Answer

A mixture of constitutional isomers

Answer

A pure enantiomer

Question 8

Which of the following reactions proceeds with inversion of configuration?

Accepted Answer

SN2 reaction

Answer

SN1 reaction

Answer

E2 reaction

Answer

E1 reaction

Question 9

Which of the following is NOT a type of stereoisomerism?

Accepted Answer

Constitutional isomerism

Answer

Enantiomerism

Answer

Diastereomerism

Question 10

Which of the following is NOT a type of stereoisomerism?

Accepted Answer

Constitutional isomerism

Answer

Enantiomerism

Answer

Diastereomerism

Answer

Geometric isomerism

Question 11

Which of the following is NOT a type of isomerism in organic chemistry?

Accepted Answer

Electronic isomerism

Answer

Structural isomerism

Answer

Geometric isomerism

Answer

Stereoisomerism

Question 12

A substance that rotates plane-polarized light to the right is said to be:

Accepted Answer

Dextrorotatory

Answer

Levorotatory

Answer

Optically inactive

Answer

Polarized

Question 13

The Cahn-Ingold-Prelog (CIP) system is used in organic chemistry to:

Accepted Answer

Assign absolute configurations to chiral centers

Answer

Determine the relative stability of isomers

Answer

Predict reaction mechanisms

Answer

Calculate molecular orbitals

Question 14

According to the CIP rules, which of the following groups has the highest priority?

Accepted Answer

Carboxyl (-COOH)

Answer

Methyl (-CH3)

Answer

Hydroxyl (-OH)

Answer

Amine (-NH2)

Question 15

A molecule that has a plane of symmetry is:

Accepted Answer

Meso

Answer

Chiral

Answer

Racemic

Answer

Diastereomeric

Question 16

The Fischer projection of a molecule shows:

Accepted Answer

The relative positions of the groups around a chiral center

Answer

The three-dimensional structure of the molecule

Answer

The absolute configuration of the molecule

Answer

The molecular orbitals of the molecule

Question 17

Which of the following is NOT a type of isomerism commonly encountered in organic chemistry?

Accepted Answer

Electronic

Answer

Structural

Answer

Stereo

Question 18

Which of the following molecules is chiral?

Accepted Answer

2-Butanol

Answer

Ethane

Answer

Benzene

Answer

Methane

Question 19

What is the relationship between enantiomers?

Accepted Answer

They are mirror images of each other

Answer

They are constitutional isomers

Answer

They are superimposable

Answer

They are identical

Question 20

Which of the following techniques is commonly used to separate enantiomers?

Accepted Answer

Chromatography

Answer

Sublimation

Answer

Distillation

Answer

Recrystallization

Question 21

Which of the following compounds will rotate plane-polarized light?

Accepted Answer

(R)-2-chlorobutane

Answer

meso-tartaric acid

Answer

2,3-dimethylbutane

Answer

n-butane

Question 22

A solution containing equal amounts of the enantiomers of a chiral molecule will have a specific rotation of:

Accepted Answer

0

Answer

The same as the specific rotation of one enantiomer

Answer

Twice the specific rotation of one enantiomer

Answer

Half the specific rotation of one enantiomer

Question 23

Which technique is specifically used to separate enantiomers?

Accepted Answer

Chiral chromatography

Answer

Recrystallization

Answer

Distillation

Answer

Extraction

Question 24

Which statement is TRUE about diastereomers?

Accepted Answer

They have different physical properties.

Answer

They have the same melting point.

Answer

They rotate plane-polarized light in opposite directions.

Answer

They are mirror images of each other.

Question 25

Which statement about meso compounds is TRUE?

Accepted Answer

They contain chiral centers but are not optically active.

Answer

They have two chiral centers.

Answer

They are mirror images of each other.