On diluting a buffer solution, its `pH`

When 0.01 moles of sodium hydroxide are added to a buffer solution, its pH changes from 4.745 to 4.815. The buffer capacity of the buffer solution is :

When small amount of an acid or alkali is mixed with a buffer solution, then pH of buffer solution

When small amount of an acid or alkali is mixed with a buffer solution, then pH of buffer solution

With dilution of an acidic solution its pH decreases

The pH of an acidic buffer solution & a basic buffer solution at 25^(@)C is :

The condition for minimum change in pH for a buffer solution is