NEET Chemistry The s-Block Elements Questions Solved


Assertion : Potassium and caesium are useful as electrodes in photoelectric cells.

Reason : Potassium and caesium , when irradiated with light, the light energy absorbed is sufficient to eject out the electron from an atom.

Show Options

(A) Potassium and caesium have low ionisation energies and, therefore, their valence shell electrons
can be easily eject out by the energy of light.

Difficulty Level:

  • 77%
  • 17%
  • 4%
  • 4%