Question

Identify total number carbon atoms present in undecane.

• A. 9
• B. 11
• C. 10
• D. 20

Hint:

Think of linguistic roots: "Deca" means 10, and "Un" means 1. Put them together: Un + deca = 1 + 10 = 11 carbon atoms!

Answer 1

The Correct Option is B

Step 1: Break the name.
The word undecane is made of un, meaning one, and decane, meaning ten.

Step 2: Add them.
One plus ten gives eleven carbons.

Step 3: State it.
So undecane is $C_{11}H_{24}$ with 11 carbon atoms.
\[ \boxed{11,\ \text{option 2}} \]