Choose incorrect statement.

pH of a buffer solution increases from 4 to 5 on addition of 0.01 mole of NaOH in 1 litre. Buffer capacity of solution is 0.01.

Phenolphthalein, methyl orange are suitable indicator for titration of weak acid with weak base

Solubility of electrolyte ${\mathrm{A}}_2{\mathrm{B}}_3$ is given as

$S={\left(\frac{K_{sp}\left(A_2{B}_3\right)}{108}\right)}^{1/5}$

Phenolphthalein will be a suitable indicator for titration of weak acid with strong base.