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If the binding energy of electrons in a...

If the binding energy of electrons in a metal is 250 kJ `"mol"^(-1)` , what is the threshold frequency of the striking photons ?

A

`4xx10^(15) sec^(-1)`

B

`3xx10^(12) sec^(-1)`

C

`5xx120^(10) sec^(-1)`

D

`6xx10^(14) sec^(-1)`

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The correct Answer is:
D
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