STANDARDChemistry-Chemical Bonding and Molecular Structure
STANDARD Chemistry Acid-Base Strength MCQ Question
Type: MCQ-conceptual-Medium-Class 11
The correct decreasing order of basic strength of the following species is ________. H₂O, NH₃, OH⁻, NH₂⁻
A
NH₂⁻ > OH⁻ > NH₃ > H₂O
B
OH⁻ > NH₂⁻ > H₂O > NH₃
C
NH₃ > H₂O > NH₂⁻ > OH⁻
D
H₂O > NH₃ > OH⁻ > NH₂⁻
Correct Answer
Option A
Detailed Explanation
NH₃ is more basic than H₂O, therefore NH₂⁻ (conjugate base of weak acid NH₃) is a stronger base than OH⁻. Thus, decreasing order of basic strength is NH₂⁻ > OH⁻ > NH₃ > H₂O.
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