Chemistry - s Block Elements Question with Solution | TestHub

Here the solubility order given in option B is correct
$\mathrm{N}\mathrm{a}\mathrm{H}\mathrm{C}{\mathrm{O}}_3<\mathrm{K}\mathrm{H}\mathrm{C}{\mathrm{O}}_3<\mathrm{R}\mathrm{b}\mathrm{H}\mathrm{C}{\mathrm{O}}_3$
Rest orders are incorrect and the correct order of solubility in water as follows
$\mathrm{L}\mathrm{i}\mathrm{F}<\mathrm{N}\mathrm{a}\mathrm{F}<\mathrm{K}\mathrm{F}$
$\mathrm{L}\mathrm{i}\mathrm{N}{\mathrm{O}}_3>\mathrm{N}\mathrm{a}\mathrm{N}{\mathrm{O}}_3>\mathrm{K}\mathrm{N}{\mathrm{O}}_3$
$\mathrm{L}{\mathrm{i}}_2\mathrm{C}{\mathrm{O}}_3<\mathrm{N}{\mathrm{a}}_2\mathrm{C}{\mathrm{O}}_3<{\mathrm{K}}_2\mathrm{C}{\mathrm{O}}_3$