Chemistry - Atomic Structure Question with Solution | TestHub

The energy required to break one mole of$\mathrm{C}\mathrm{l}-\mathrm{C}\mathrm{l}$bonds in$\mathrm{C}{\mathrm{l}}_2$is 242 kJ$\mathrm{m}\mathrm{o}{\mathrm{l}}^{-1}$. The longest wavelength of light capable of breaking a single$\mathrm{C}\mathrm{l}-\mathrm{C}\mathrm{l}$bond is

($\mathrm{C}=3\times 10^8\mathrm{m}{\mathrm{s}}^{-1}$and${\mathrm{N}}_{\mathrm{A}}=6.02\times 10^{23}\mathrm{m}\mathrm{o}{\mathrm{l}}^{-1}$)