Question

Which of the following is acidic in aqueous solutions :

• A. $A{l}_2{\left(S{O}_4\right)}_3$
• B. Potash alum
• C. Chrome alum
• D. All

Answer 1

The correct option is D All

$H_{2}S{O}_4$ is a strong acid and $Al(OH{)}_3$ is a weak base. Thus the salt $A{l}_2(S{O}_4{)}_3$ is acidic in nature. As this salt is present in all above options, accompanied by a neutral salt in Option B and another Acidic salt in Option C, all above salt solutions are acidic in nature