Question

Assertion: Polytetrafluoroethylene is used in making non-stick cookwares.
Reason: Fluorine has highest electronegativity.
A. Both assertion and reason are correct and reason is the correct explanation for assertion.
B. Both assertion and reason are correct but reason is not the correct explanation for assertion.
C. Assertion is correct but reason is incorrect.
D. Both assertion and reason are incorrect.

Answer 1

Hint: Polytetrafluoroethylene is also named as Teflon. Teflon is a polymer whose monomer units are tetrafluoroethylene. Teflon is very useful in making some important substances such as non-stick cookware.

Complete Step by Step Solution:
Let's understand the reason for using polytetrafluoroethylene in the manufacturing of non-stick cookware. The production of Teflon is done by the heating of tetrafluoroethylene in presence of a persulfate catalyst at high pressure. The nature of Teflon is chemically inert. Therefore, it has resistance to chemical reactions by corrosive reagents. This is the reason for using it in the manufacture of non-stick cookware. Therefore, the statement in the assertion is correct.

Let's discuss electronegativity in detail. It is the property of an atom to lose the outermost electron in the gaseous state. And, we know that, among all the elements in the periodic table, fluorine possesses the highest electronegativity. Therefore, the statement of the reason is also correct. But, this statement does not explain the assertion.
Therefore, B is right.

Note: Teflon has many applications in different industries because of its resistance to chemical attacks. The Teflon coating makes the substance resistant to many corrosive chemicals and the substance's capacity to withstand extreme cold and heat.