Which of the following statements is not correct?

Sodium dichromate is more soluble in water than potassium dichromate

Chromate and di chromate ions are interconvertible by changing the pH of the solution

The reaction of ${\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7$ with $\mathrm{NaCl}$ in the presence of cone. ${\mathrm{H}}_2{\mathrm{SO}}_4$ is $$\begin{gathered} {\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7+4\mathrm{NaCl}+6{\mathrm{H}}_2{\mathrm{SO}}_4\to 2{\mathrm{KHSO}}_4+4{\mathrm{NaHSO}}_4+3{\mathrm{H}}_2\mathrm{O}+2{\mathrm{CrO}}_2{\mathrm{Cl}}_2 \\ (\mathrm{red} \mathrm{vapours}) \end{gathered}$$

${\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7$ is an oxidizing agent in acidic medium. Its equivalent mass is equal to the molar mass divided by five