MCQ
Which mixture forms a buffer when dissolved in $1\, lit$. of water
- A$0.2\, mol\, NaOH$ and $0.2\, mol\, HBr$
- B$0.2\, mol\, NaCl$ and $0.3\, mol\, HCl$
- ✓$0.4\, mol\, HNO_2$ and $0.2\, mol\, NaOH$
- D$0.5\, mol\, NH_3$ and $0.5\, mol\, HCl$
✓
Answer
Correct option: C.
$0.4\, mol\, HNO_2$ and $0.2\, mol\, NaOH$
c
$0.4\, mol\,HNO _2+0.2 \,mol\,NaOH$ will form a buffer as it is a mixture of weak acid and its conjugate base.
$0.4\, mol\,HNO _2+0.2 \,mol\,NaOH$ will form a buffer as it is a mixture of weak acid and its conjugate base.
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