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JEE Main20202 Sep 2020Morning ShiftChemistrys Block ElementsActual

The metal mainly used in devising photoelectric cells is :

Options

  1. ANa
  2. BLi
  3. CRb
  4. DCs

Correct answer

D. Cs

Step-by-step solution

Cesium has lowest ionisation enthalpy and hence it can show photoelectric effect to the maximum extent hence it is used in photo electric cell.

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