Question

) Calculate the wavelength of the radiation which cause photochemical dissociation of a chlorine molecule. The bond dissociation energy of CI-Cl bond is 245 kJ/mol.
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Answer 1

Answer:

Correct option is

A

4.96×10

−7

m

Cl−Cl bond energy =241kJ/mol

1 mole =6.023×10

23

molecules = Avogadro's Number

Cl−Cl bond energy per molecule =

6.023×10

23

241×10

3

=4×10

−19

J

Wavelength is given by

λ

hc

=4×10

−19

J

⇒λ=

4×10

−20

6.62×10

−34

×3×10

8

=4.96×10

−7

m