MCQ
The energy required to break one mole of $Cl- Cl$ bonds in $Cl_2$ is $242\, kJ \,mol^{- 1}.$ The longest wavelength of light capable of breaking a single $Cl - Cl$ bond is ............ $\mathrm{nm}$
$(C= 3 \times 10^8 \,ms^{-1}$ and $N_A =6.02 \times mol^{-1}).$
- A$594$
- B$640$
- C$700$
- ✓$494$
