Ncert Exercises & Solutions

Select the correct option based on statements below:

Assertion (A):	Polytetrafluoroethylene is used in making non-stick cookware.
Reason (R):	Fluorine has the highest electronegativity.

1.	Both (A) and (R) are true but (R) is not the correct explanation of (A).
2.	Both (A) and (R) are true and (R) is the correct explanation of (A).
3.	Both (A) and (R) are false.
4.	(A) is true but (R) is false.

Hint: Polytetrafluoroethylene is also known as Teflon.

Explanation: Polytetrafluoroethylene (Teflon) is used in making non-stick cookware because it is chemically inert, thermally stable, and resistant to attack by corrosive reagents.
Due to the presence of strong C-F bonds Teflon has high thermal stability and chemical inertness.

Fluorine is the most electronegative element in the periodic table.

Hence, Assertion and Reason both are correct statements But reason does not explain Assertion.

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