The highest boiling point is expected for

Question

The highest boiling point is expected for (A) iso-butane (B) n-octane (C) 2, 2, 3, 3-tetramethyl butane (D) n-butane

Tardigrade Admin · Accepted Answer

Boiling point of alkane increases with molar mass. Among isomeric alkanes, branching decreases boiling point. Therefore, n-octane has highest boiling point, higher than 2, 2, 3, 3-tetramethyl-butane (an isomer of n-octane).

Q. The highest boiling point is expected for

iso-butane

n-octane

2, 2, 3, 3-tetramethyl butane

n-butane

Boiling point of alkane increases with molar mass. Among isomeric alkanes, branching decreases boiling point. Therefore, n-octane has highest boiling point, higher than 2, 2, 3, 3-tetramethyl-butane (an isomer of n-octane).