AP EAMCET Engineering 21 Sep 2020 Shift 1 Paper

Section: Chemistry

Question : 123 of 160

Marks: +1, -0

If the binding energy of electrons in a metal is 250 kJ/mol, what should be the threshold frequency of the striking photons in order to free an electron from the metal surface?

6.26×1014 s−1
12.4×1014 s−1
6.26×1012 s−1
12.4×1012 s−1

Validate

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