Q. Equimolar solutions of the following substances were prepared separately. Which one of these will record the highest pH value?
A) BeCl₂
B) BaCl₂
C) AlCl₃
D) LiCl
Explanation
[Solution from source] BaCl₂ is a salt of a strong acid and a strong base, so it does not hydrolyse and its solution is neutral (pH ≈ 7). BeCl₂ and AlCl₃ hydrolyse strongly to give acidic solutions, and LiCl is very slightly acidic due to the small, polarising Li⁺. So BaCl₂ has the highest pH. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.