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Assertion : Potassium and caesium are used in photoelectric cells. Reason : Potassium and caesium emit electrons on exposure to light

Answer»

If both assertion and reason are TRUE and the reason is the correct EXPLANATION of the assertion
If both assertion and reason are true but reason is nto the correct exaplation of the assertion
If assertion is true but reason is false
If the assertion and reason both are false

SOLUTION :K and CS emit electrons on exposure of light due to low ionisation potential.


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