Question

The preferred opening angles of the nano cones are __________

(a) 20, 30, 40

(b) 20, 40, 60

(c) 20, 40, 80

(d) 20, 40, 50

The question was asked by my school teacher while I was bunking the class.

This is a very interesting question from Nano Wires and Nano Cones topic in portion Nano Materials of Applied Chemistry

Answer 1

Correct option is (b) 20, 40, 60

To explain I would say: The preferred opening angles of the nano cones are 20, 40, and 60. The opening angles of the nano cones are generally not arbitrary. Those given angles are also approximate.