Question

Five solutions $A,B,C,D,E$ when tested with universal indicator showed $pH$ as $4,1,11,7$ and $9$ respectively. Which solution is strongly alkaline?

• A. $A$
• B. $B$
• C. $C$
• D. $D$

Answer 1

The correct option is C $C$

Five solutions in tubes $A,B,C,D,E$ have $pH4,1,11,7$ and $9$. $A$ and $B$ tubes have acidic $pH$ which is less than $7$ so they are acids while $D$ is neutral and tubes $CE$ have alkaline solution so they are bases and $C$ is the strongest base with highest $pH$ value.