MHT CET · Chemistry · Classification of Elements and Periodicity in Properties
Which element from following is used in photoelectric cells?
- A Li
- B Be
- C Cs
- D Mg
Answer & Solution
Correct Answer
(C) Cs
Step-by-step Solution
Detailed explanation
Cesium (Cs) is the element used in photoelectric cells:
Explanation: Cesium is the preferred metal for photoelectric cells because it can easily convert sunlight into electricity. It has a low ionization energy and is the most electropositive element. The amount of energy required to eject electrons from a cesium surface is relatively small, only 206.5 kJ/mol.
Explanation: Cesium is the preferred metal for photoelectric cells because it can easily convert sunlight into electricity. It has a low ionization energy and is the most electropositive element. The amount of energy required to eject electrons from a cesium surface is relatively small, only 206.5 kJ/mol.
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