Question

How many $1^{\circ }$ carbon atoms will be present in a simplest hydrocarbon having two $3^{\circ }$ and one $2^{\circ }$ carbon atoms?

• A. 3
• B. 4
• C. 5
• D. 6

Answer 1

The correct option is B 4

2,4-dimethylpentane is the simplest hydrocarbon that contains 4 primary, 1 secondary and 2 tertiary carbon atoms.
A primary carbon atom is attached to only one other carbon atom.
A secondary carbon atom is attached to two other carbon atoms.
A carbon atom is attached to three other carbon atoms.
A quaternary carbon atom is attached to four other carbon atoms.