Which of the following compounds has lowest boiling point ?

Options

A. n-butyl alcohol
B. Iso-butyl alcohol
C. Tert-butyl alcohol
D. Sec-butyl alcohol

Answer

C

Explanation

For isomeric alcohols, the boiling point decreases with increase in branching of carbon chain. Therefore, the decreasing order of boiling point is
`underset("n-butyl alcohol")(CH_(3)CH_(2)CH_(2)OH) gt CH_(3)underset("Iso-butyl acohol")underset(CH_(3))underset(|)(CH)CH_(2)OHgt`
`underset("Sec-butyl alcohol")(CH_(3)underset(CH_(3))underset(|)(C )H CH_(2)CH_(3)gt) underset("Tert-butyl alcohol")(CH_(3)-underset(OH)underset(|)overset(CH_(3))overset(|)(C)-CH_(3)`