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NEET Sample Paper NEET Sample Test Paper-58

  • question_answer
    Photoelectric effect is maximum in:

    A) Cs                                

    B) Na     

    C) K                                 

    D) Li

    Correct Answer: A

    Solution :

    [a] Cs Photoelectric effect: When electromagnetic radiation strikes on the surface of alkali metals, they emit electrons, i.e. photoelectric effect. Among all group 1 element, (Li, Na, K, Rb, & Cs) Cs has lowest ionization energy and hence it can show photoelectric effect to the maximum. (As low I.E. allows the electrons to be easily ejected when exposed to light.)


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