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Standard XII
Chemistry
Classification
Why is pentan...
Question
Why is pentan-1-ol not optically active?
A
No chiral carbon
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B
Have more than 1 chiral carbon
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C
Can polarize light
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D
All of the above
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Solution
The correct option is
A
No chiral carbon
Pentan-1-ol is not optically active as it does not have any chiral carbon atom.
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Similar questions
Q.
Statement 1:
Pentan-2-ol exhibits optical isomerism.
Statement 2: P
entan-2-ol has one chiral carbon.
Q.
An organic compound having a carbon attached to four different groups is optically active. But, is the opposite also true? That is, do all optically active organic compounds have chiral carbons? Not necessarily. Presence or absence of chiral centre is not the sufficient criterion for optical activity. The ultimate criterion is the presence or absence of either plane or centre of symmetry. Two compounds which are non-superimposable mirror images of each other are called enantiomers.
If a compound contains more than one chiral carbon, new words are required to describe the relationship between various stereoisomers of the compounds. Those words are diastereomers and mesomers.
Optically active compounds among the following is :
Q.
For a molecule with two like chiral carbon atoms, the number of optically inactive form is ?
Q.
For a molecule with two like chiral carbon atoms, the number of optically active form is:
Q.
How can you identify chiral carbon and optically active compound by seeing the molecule?
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