AIIMS 2018 Chemistry Properties of Hydroxides MCQ Question
Which one of the following is correct statement
The hydroxides of Al is more acidic than that of B
The hydroxides of B is basic while that of Al is amphoteric
The hydroxide of B is acidic, while that of Al is amphoteric
The hydroxides of B and Al are amphoteric
Correct Answer
Detailed Explanation
The hydroxide of B, typically referring to a metal like barium (Ba(OH)₂), is basic due to its ability to dissociate in water and produce OH⁻ ions, while aluminum hydroxide (Al(OH)₃) is amphoteric, meaning it can react with both acids and bases. Option A is incorrect because aluminum hydroxide is not more acidic than barium hydroxide; option B mischaracterizes barium hydroxide as basic, which is correct, but incorrectly states aluminum hydroxide as only amphoteric without acknowledging its weak acidic properties in certain reactions. Option D is incorrect because while aluminum hydroxide is amphoteric, barium hydroxide is not; it is strongly basic.
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