JEE Main 2025 Chemistry question
Which of the following happens when NH4OH is added gradually to the solution containing 1M A²⁺ and 1M B³⁺ ions ? Given : and at 298 K.
Answer: (1)
Solution
For A(OH)2, [OH⁻]>3×10⁻⁵M needed; for B(OH)3, [OH⁻]>3×10⁻⁶M needed. B(OH)3 requires lower [OH⁻], so precipitates first.