Question

How many set of statements are correct?
(i) Solubility of alkali metal hydroxides is in order
$CsOH > RbOH > KOH > NaOH > LiOH$
(ii) Solubility of alkali carbonates is in order
$Li _{2} CO _{3}> Na _{2} CO _{3}> K _{2} CO _{3}> Rb _{2} CO _{3}> Cs _{2} O _{3}$.
(iii) Hydrated radii is in order
$Li ^{+}< Na ^{+}< K ^{+}< Rb ^{+}< Cs ^{+}$
(iv) Stability of peroxides is in order
$Na _{2} O _{2}< K _{2} O _{2}< Rb _{2} O _{2}< Cs _{2} O _{2}$

Answer 1

(i), (iv)