Which of the following statement is incorrect?

Benzene diazonium chloride is prepared by the reaction of aniline with nitrous acid at 273-278 K which is known as diazotisation.
Due to its instability, the diazonium salt is not generally stored and is used immediately after its preparation.
${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{NH}}_2+{\mathrm{NaNO}}_2+2\mathrm{HCI}\stackrel{273-278 \mathrm{K}}{\to }{\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{N}}_2^{+}{\mathrm{Cl}}^{-}+\mathrm{NaCl}+2{\mathrm{H}}_2\mathrm{O}$
Temperature must vary from 0-5^oc.