Question

Q3.)IN PHOTOELECTRIC EFFECT, THE TERM WORK FUNCTION IS SIMILAR
TO:-
1 BOND ENERGY
2 ELECTRON AFFINITY

3 IONIZATION ENERGY
4 ATOMICITY

plz tell correct option​

Answer 1

Answer:

A solid-state physics, the work function (sometimes spelled workfunction) is the minimum thermodynamic work (i.e. energy) needed to remove an electron from a solid to a point in the vacuum immediately outside the solid surface.

The work function is not a characteristic of a bulk material, but rather a property of the surface of the material (depending on crystal face and contamination), and varies for different metals.

Answer 2

In the Photoelectric effect, the term Work Function is similar to 'Ionization Energy.' Hence, option 'C' is correct.

Work Function is the minimum amount of energy required to remove an electron from the metal surface. It is a property of an element and varies from element to element.

• Bond Energy refers to the amount of energy required to break one mole of the bonds of the compound into its constituent atoms. It is measured in KJ/mol. Hence, Option 'A' is incorrect.
• Electron affinity is the amount of energy released when an electron is added to a single gaseous atom. It can be exothermic or endothermic depending on the configuration of the atom. Hence, option 'B' is also incorrect.
• Ionization Energy refers to the amount of energy required to remove an electron from the isolated gaseous atom. It depends on the size of an atom, as the size of an atom decreases the Ionization Energy increases. Hence, option 'C' is correct.
• Atomicity is the number of atoms present in any molecule. For eg:- H20 has atomicity = 2+1 = 3 and C6H12O6 has atomicity = 6+12+6 = 24. Hence, option 'D' is also incorrect.

So, In the Photoelectric effect, the term Work Function is similar to 'Ionization Energy.' Hence, option 'C' is correct.

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