Which of the follwing alkanes has the lowest melting point?

Options

A. `CH_(4)`
B. `CH_(3)CH_(3)`
C. `CH_(3)CH_(2)CH_(3)`
D. `CH_(3)(CH_(2))_(2)CH_(3)`

Answer

C

Explanation

Order of melting point:
`underset(-138^(@))(n-"Butane")gtunderset(-172^(@)C)("Ethane")gt underset(-180^(@)C)("Methane")gtunderset(-187^(@)C)("Propane")`