What is the correct relationship between the pHs of isomolars solution of sodium oxide ( pH ₁ ) , sodium sulphide ( pH ₂ ) , sodium selenide ( pH ₃ ) and sodium telluruide ( pH ₄ ) ?

Step-by-step solution

It is given that the isomolar solutions are sodium salt of Group 16 elements are present in equal molar concentration. The salts on hydrolysis with water, it produces an acid and base, as follows: I. Na ₂ O + H ₂ O 2 NaOH II. Na ₂ ~S + H ₂ O 2 NaOH + H ₂ ~S III. Na ₂ Se + H ₂ O 2 NaOH + H ₂ Se IV. Na ₂ Te + H ₂ O >2 NaOH + H ₂ Te The acidic strength of the hydrides is in the order H ₂ O Na ₂ ~S > Na ₂ Se > Na ₂ Te Therefore, the order of pH of the given aqueous solution is pH ₁> pH ₂> pH ₃> pH ₄ Related Theory The