Question

Which substance has (2°) secondary carbon?
(A) Propane
(B) n-Butane
(C) 2 Methyl propane
(D) Methane

Answer 1

Propane has (2°) secondary carbon. Therefore, Option A is the correct answer.

Explanation:

A secondary carbon written as 2° (#2 with a degree symbol) is a carbon attached to two other carbons.

A tertiary carbon written as 3° (#3 with a degree symbol) is a carbon attached to three other carbons.

And a quaternary carbon written as 4° (#4 with a degree symbol) is a carbon attached to four other carbons.