Question

Amongst the following compounds, the optically active
alkane having lowest molecular mass is
H
|
(a) CH₃ - C -
|
C₂H₅
CH₃
|
(b) CH₃ - CH₂ - CH - CH₃
(c) CH₃ -CH₂ -CH₂ -CH₃
(d) CH₃ -CH₂ -C ≡ CH

Answer 1

Answer:

(b) CH₃ - CH₂ - CH - CH₃

(c) CH₃ -CH₂ -CH₂ -CH₃

(d) CH₃ -CH₂ -C ≡ CH

Explanation:

Answer 2

Option A is optically active.

Explanation:

• Optical isomers are possible for those organic compounds that are having chiral carbon in its structure.

• A chiral carbon is a sp3 hybrid carbon with four different groups attached with each bond.

• In option 2, 3 and 4, we see there's no stereocentre or chiral carbon, which can have optical isomers.

• In option A, this structure has a stereocentre with a chiral carbon.

• So, option A has stereo centre.

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