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Question
Chemistry
Which of the following is most commonly used in photo-electrical cells?
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Q. Which of the following is most commonly used in photo-electrical cells?
JIPMER
JIPMER 1995
A
Francium
B
Silicon
C
Ceasium
D
Lithium
Solution:
Ceasium is the most electropositive element of the periodic table as its ionisation energy is very less. Hence, it can lose electron very easily. Due to this property it is used in photoelectric cells.