Q. Which of the following has highest pH?
A) $\frac{M}{4}\ KOH$
B) $\frac{M}{4}\ NaOH$
C) $\frac{M}{4}\ {NH}_{4}OH$
D) $\frac{M}{4}\ Ca(OH)_{2}$
Explanation
(d)
pH of a solution $\propto \left\lbrack OH^{-} \right\rbrack\ \frac{M}{4}\ Ca(OH)_{2}$ solution will give highest concentration of $\lbrack OH^{-}\rbrack$. Hence, it has highest pH.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.