JEE CHEMISTRY MCQ: STRUCTURE OF ATOM

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Photodissociation of water

{H}_2 {O}({l})+h v \rightarrow {H}_2({~g})

+1 / 2 {O}_2({~g})

has been suggested as a source of hydrogen. The heat absorbed in this reaction is

289.5 \mathrm{~kJ} / \mathrm{mole}

of water decomposed. The maximum wavelength that would provide the necessary energy assuming that one photon causes the dissociation of one water molecule is (

1 \mathrm{eV}=96.5 \mathrm{~kJ} / \mathrm{mol}

)

View answer and explanation

Correct option: A

413.33 \mathrm{~nm}

Option A (

413.33 \mathrm{~nm}

) is correct because it is calculated using the energy of the photon required for photodissociation of water.

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