CBSE Class 11-science Answered

n factor :

For acids: it is their basicity .

Example: For H₂SO₄ the basicity is 2 since it has gives two H+ ions on dissociation.

So, n fatcor = 2

For bases, it is their acidity.

Example: For NaOH the acidity is 1 since it gives one OH^- ion on dissociation.

So, n fatcor = 1

For a species getting oxidised , n factor is equal to the number of electrons lost.

Example: Cu Cu²⁺ + 2 e^-

n factor  = 2

For a species getting reduced , n factor is equal to the number of electrons gained.

Example: Zn²⁺ + 2 e^- Zn

n factor  = 2