Haloalkanes and Haloarenes Test

Result

Haloalkanes and Haloarenes Test - 4

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Weekly Quiz Competition

Question 1
1 / -0

Enantiomers are ________________ mirror images.

A
Superimposable

B
Non-Superimposable

C
Anything

D
Can’t Say

Solution

The stereoisomers related to each other as non-superimposable mirror images are called Enantiomers.

So, from the above explanation we can conclude that Enantiomers are Non-Superimposable mirror images.
Question 2
1 / -0

Enantiomers only differ with respect to the _______________________?

A
Melting Point.

B
Boiling Point.

C
Refractive Index

D
Rotation of plane polarised light

Solution

Enantiomers possess identical physical properties namely, melting point, boiling point, solubility, refractive index etc.

They only differ with respect to the rotation of plane polarised light.

If one of the enantiomer is dextro rotatory. The other will be laevo rotatory.
Question 3
1 / -0

Racemic mixture have _____________ ?

A
Zero optical rotation

B
Positive optical rotation

C
Negative optical rotation

D
Varies

Solution

A mixture containing two enantiomers in equal proportions will have zero optical rotation, as the rotation due to one isomer will be cancelled by the rotation due to the other isomer.

Such a mixture is known as racemic mixture or racemic modification.

A racemic mixture is represented by prefixing dl or (+, -) before the name, for example (+, -) butan-2-ol. The process of conversion of enantiomer into a racemic mixture is known as racemisation.