Question

Which property of a material is paramount to it being charged by friction?
A. Electron affinity
B. Electronegativity
C. Potential difference
D. None of these

Answer 1

Hint: The question talks about the influence of friction, the force created by rubbing a face or layer of one material over the other most especially rough or coarse surfaces by these properties, electron affinity, electronegativity and potential difference.

Complete step by step answer:
Option C, Potential difference is the correct answer, as electric double layers which are in contact generate an intrinsic static electricity potential difference and an attractive static electricity force between the contacting bodies.
Option A, Electron affinity and Option B, electronegativity are not correct and they are the characteristics of atoms of gases or elements which have nothing to do with solid layered material. Electron affinity and electronegativity are properties of elements arranged in order of their atomic number in the periodic table of elements.
Valence electrons are often responsible for the reason why most elements can be electronegative, electropositive, have electron affinity (want or desire for electrons).
Other options apart from potential differences are chemical application options because they can only take place in and around atoms of elements or molecules of compounds which have decided to join or interact with other similar or dissimilar atoms, molecules, elements and compounds.
That is why Option C is correct, potential difference of a material is paramount to it being charged by friction.

Note:Potential difference is only affected by frictional force which drives a unit charge from one point of reference to a point of interest. Some factors like concentration, pressure, temperature, catalyst affect other options apart from potential difference.