JEE Main 2021 — Structure Of Atom Question with Solution
From: JEE Main 2021 (Online) 25th February Evening Shift
Question
Among the following, number of metal/s which can be used as electrodes in the photoelectric cell is _________. (Integer answer)
(A) Li
(B) Na
(C) Rb
(D) Cs
(A) Li
(B) Na
(C) Rb
(D) Cs
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Correct answer
See solution below.
Step-by-step explanation
Among the given alkali metals, only cesium (Cs)
is used as electrode in the photoelectric cell
due to its lowest ionisation energy.
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