1.

How many alcohols with molecular formula `C_(4)H_(10)O` are chiral in nature ?A. 1B. 2C. 3D. 4

Answer» Correct Answer - A
The three isomers of butanol are possible. Structural formula of these isomers are given below
(i) `underset("Butan-1-ol")(CH_(3)CH_(2)-CH_(2)-CH_(2)OH)`
No carbon is chiral in this compound as none of the four carbon is bonded to four different substituents.
(ii) `underset("Butan-2-ol")(CH_(3)-CH_(2)-underset(OH)underset(|)overset(**)(CH)-CH_(3))`
In this compound, asterisk marked carbon is chiral carbon as all four substituents, attached to it are different.
(iii) `underset("2-methylpropan-2-ol")(H_(3)C-underset(OH)underset(|)overset(CH_(3))overset(|)(C)-CH_(3))`
Here, again carbon is not chiral in nature.
So, only one alcohol is chiral in nature and the correct option is (a).


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