Question

Assertion: Photoelectric effect is easily shown by cesium metal. Reason:Photoelectric effect is easily given by the metals having high ionization enthalpy

Answer 1

Answer:

• The work function of alkali metals is quite low (e.g. for potassium, it is 2.3 eV and for sodium is 2 eV). As a result, they show photoelectric effect even with visible light. For this reason, alkali metals are most suited for photoelectric emission.

Answer 2

Answer:

Assertion is correct but reasons is incorrect