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Byju's Answer
Standard XII
Chemistry
Stereoisomerism
Which of the ...
Question
Which of the following compound is optically inactive?
A
Propanoic acid
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B
Glyceraldehyde
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C
Lactic acid
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D
Glucose
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Solution
The correct option is
A
Propanoic acid
Molecules that posses chirality are optically active. Chiral carbon is the one having all different groups attached.
Propanoic acid is:
C
H
3
C
H
2
C
O
O
H
has no chirality thus its optically inactive
Glyceraldehyde:
H
O
C
C
H
(
O
H
)
C
H
2
O
H
has a ciral center thus its optically active
Lactic acid is
H
3
C
C
H
(
O
H
)
C
O
O
H
has a chiral center thus its optically active
Glucose is
H
O
C
C
H
(
O
H
)
C
H
(
O
H
)
C
H
(
O
H
)
C
H
(
O
H
)
C
H
2
O
H
has multiple chiral center thus its optically active
thus option A is correct
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