JEE PYQ: S Block Elements Question 14
Question 14 - 2020 (02 Sep Shift 1)
The metal mainly used in devising photoelectric cells is:
(a) Na (b) Li (c) Rb (d) Cs
Show Answer
Answer: (d)
Solution
Cesium has the lowest ionisation enthalpy and hence it shows the photoelectric effect to the maximum extent. So it is used in photoelectric cells.