MCQ
Which of the following pairs constitutes a buffer ?
- A$HCl$ and $KCl$
- ✓$HNO_2$ and $NaNO_2$
- C$NaOH$ and $NaCl$
- D$HNO_3$ and $NH_4NO_3$
✓
Answer
Correct option: B.
$HNO_2$ and $NaNO_2$
b
A pair constituent with $H N O_{2}$ and $N a N O_{2}$ because $H N O_{2}$ is weak acid and $N a N O_{2}$ is a salt of weak acid $\left(H N O_{2}\right)$ with strong base (NaOH), Hence it is an example of acidic buffer solution.
A pair constituent with $H N O_{2}$ and $N a N O_{2}$ because $H N O_{2}$ is weak acid and $N a N O_{2}$ is a salt of weak acid $\left(H N O_{2}\right)$ with strong base (NaOH), Hence it is an example of acidic buffer solution.
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