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Model Paper 3 — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryModel Paper 31 Mark
MCQ
The electrons are ejected from the metal surface when the light of certain frequencies strikes the surface is called ____________________.
  • A
    Faraday’s cathode ray discharge model
  • B
    Thomson model for electron
  • ✓
    Photoelectric effect
  • D
    Planck's quantum theory
✓

Answer

Correct option: C.
Photoelectric effect
(c) Photoelectric effect
Explanation: Electrons are ejected from the metal when the light of a certain frequency strikes the surface of a metal, This phenomenon is known as the photoelectric effect and the ejected electrons are called photoelectrons.

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