Question

The pH of 0.1 M solution of the following salts increases in the order

• A. NaCl < NH₄Cl < NaCN < HCl\
• B. HCl < NaCN < NH₄Cl < NaCl
• C. NaCN < NH₄Cl < NaCl < HCl
• D. HCl < NH₄Cl < NaCl < NaCN

Answer 1

The correct option is D

HCl < NH₄Cl < NaCl < NaCN

$N{H}_{4}Cl$ undergoes cationic hydrolysis hence pH is $<7$. NaCN undergoes anionic hydrolysis

Hence pH is $>7$. \(HCl\) is strong acid and \(NaCl\) is neutral solution.

Hence the pH of given solutions will increases.$HCl<N{H}_{4}Cl<NaCl<NaCN$