MCQ
Consider following reaction
$A$ is
- ✓

- B

- C

- D

$A$ is





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The pair $(s)$ of solutions which form a buffer upon mixing is(are)
$(A)$ $\mathrm{HNO}_3$ and $\mathrm{CH}_3 \mathrm{COOH}$
$(B)$ $\mathrm{KOH}$ and $\mathrm{CH}_3 \mathrm{COONa}$
$(C)$ $\mathrm{HNO}_3$ and $\mathrm{CH}_3 \mathrm{COONa}$
$(D)$ $\mathrm{CH}_3 \mathrm{COOH}$ and $\mathrm{CH}_3 \mathrm{COONa}$
$\mathrm{H}_2, \mathrm{He}_2^{+}, \mathrm{O}_2^{+}, \mathrm{N}_2^{2-}, \mathrm{O}_2^{2-}, \mathrm{F}_2, \mathrm{Ne}_2^{+}, \mathrm{B}_2$

