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The energy required to break one mole of Cl-Cl bonds in Cl2 is 242 kl mol^-1. The longest wavelength

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The energy required to break one mole of Cl-Cl bonds in Cl2 is 242 kl mol-1. The longest wavelength of light capable of breaking a single Cl-Cl bond is

(a) 594 nm  (b) 640 nm  (c) 700 nm  (d) 494nm

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Correct option (d) 494nm

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