Question

Chlorofluorocarbons such as ${CCl}_3 {F}(\mathrm{M}=137.5)$ and ${CCl}_2 {F}_2(\mathrm{M}=121)$ have been linked to ozone depletion in Antarctica. As of 2004, these gases were found in 275 and 605 parts per trillion $\left(10^{12}ight),$ by volume. What are the concentrations of these gases under conditions typical of Antarctica stratosphere $(200 \mathrm{~K}$ and $0.08 \mathrm{~atm}) ?(R=0.08 \, l 	ext{-atm/K-mol})$

Accepted Answer

$\left[{CCl}_3 {F}ight]=1.375 	imes 10^{-12} \mathrm{~mol} \, {l}^{-1},\left[{CCl}_2 {F}_2ight]=3.025 	imes 10^{-12} \mathrm{~mol} \, l^{-1}$

Answer

$\left[{CCl}_3 {F}ight]=2.75 	imes 10^{-14} \mathrm{~mol}\, {l}^{-1},\left[{CCl}_2{F}_2ight]=6.05	imes 10^{-14} \mathrm{~mol} \, {l}^{-1}$

Answer

$\left[{CCl}_3 {F}ight]=2.75 	imes 10^{-10} \mathrm{~mol}\, {l}^{-1},\left[{CCl}_2 {F}_2ight]=6.05	imes 10^{-10} \mathrm{~mol} \, {l}^{-1}$

Answer

$\left[{CCl}_3 {F}ight]=1.375 	imes 10^{-13} \mathrm{~mol} \, {l}^{-1},\left[{CCl}_2 {F}_2ight]=3.025 	imes 10^{-12} \mathrm{~mol} \, {l}^{-1}$

JEE CHEMISTRY MCQ: SOME BASIC CONCEPTS OF CHEMISTRY

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