Freons are chlorofluorocarbons (CFCs) or hydrochlorofluorocarbons (HCFCs), which are hydrocarbons where some or all of the hydrogen atoms have been replaced by chlorine and fluorine atoms.
Among the given options, only \( \text{C}_2\text{Cl}_2\text{F}_2 \) (dichlorodifluoroethylene) contains both chlorine and fluorine along with carbon, making it a Freon.
\( \text{C}_2\text{Cl}_2\text{F}_2 \) is an example of a Freon.


A square loop of sides \( a = 1 \, {m} \) is held normally in front of a point charge \( q = 1 \, {C} \). The flux of the electric field through the shaded region is \( \frac{5}{p} \times \frac{1}{\varepsilon_0} \, {Nm}^2/{C} \), where the value of \( p \) is: