Question

Formula of Freon-11 is-

• A. ${CCl}_{3}F$
• B. ${CCl}_2{F}_2$
• C. ${Cl}_{3}C-{CCl}_2{F}_2$
• D. ${CCl}_2{FCCl}_{2}F$

Answer 1

The correct option is A

${\mathrm{CCl}}_3\mathrm{F}$

Step 1:

• The combination of chlorine ($\mathrm{Cl}$), fluorine ($\mathrm{F}$), and carbon ($\mathrm{C}$) atoms form compounds that are known as Chloro-fluoro carbon (CFC) or Freons.
• Polychloro-fluoro alkanes are named as freons.
• The formula of freon-11 is ${\mathrm{CCl}}_3\mathrm{F}$.
• Freon-11 is formed by the combination of Carbon tetrachloride (${\mathrm{CCl}}_4$) and Hydrogen fluoride ($\mathrm{HF}$). In the presence of Antimony trichloride (${\mathrm{SbCl}}_3$) catalyst.
• The chemical reaction involved in the formation of Freon-11 is:

${\mathrm{CCl}}_4+\mathrm{HF}\stackrel{{\mathrm{SbCl}}_3}{\to }{\mathrm{CCl}}_3\mathrm{F}+\mathrm{HCl}$

Final answer:

Hence, option (A) is correct.