Question:
Which of the following can form buffer solution?
Which of the following can form buffer solution?
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Basic buffer = weak base + salt of that base with strong acid.
Updated On: Mar 19, 2026
- aq. NH₃ + NH₄OH
- KOH + HNO₃
- NaOH + HCl
- KI + KOH
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The Correct Option is A
Solution and Explanation
Step 1: A buffer solution consists of a weak acid/base and its conjugate salt.
Step 2:
\beginitemize
• NH₃ is a weak base.
• NH₄OH provides NH₄⁺, the conjugate acid of NH₃.
\enditemize
Step 3: Other combinations involve strong acids and strong bases which cannot form buffers.
Hence, option (A) forms a buffer solution.
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