Among the following , number of metals w...

Among the following , number of metals 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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The correct Answer is:

A

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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