Question

Which of the following nano structures includes nanotubes as an example?

• A. Zero dimensional
• B. One dimensional
• C. Two dimensional
• D. Three dimensional

Hint:

A nanotube is thin in two directions and long in one.

Answer 1

The Correct Option is B

Step 1: Picture a nanotube:
It is like a very thin straight tube. Its width is a few nanometres, but its length can be micrometres or more.

Step 2: Count the large directions:
Only one direction (the length) is outside the nano range. That is the meaning of "one dimensional" here.

Step 3: Pick:
Option (B).

Final Answer:
Only the length is large, so it is one dimensional. \[ \boxed{B} \]