Question

The solution which has $pH$ less than 7, is:

• A. solution of caustic soda in water
• B. solution of common soda in water
• C. solution of blue vitriol in water
• D. solution of baking soda in water

Answer 1

Answer: (A)

solution of caustic soda in water

If the $pH$ of a solution is two than $7$. The solution is called acidic in an acidic solution than the concentration of hydrogen ions is greater than the concentration of hydroxide ions.

So, the solution of common soda have $pH$ value less than $7$.