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6.2. Equilibrium - II (icon Equilibrium) — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry6.2. Equilibrium - II (icon Equilibrium)1 Mark
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.

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