4. Chemical bonding and molecular structure — Chemistry STD 11 Science — Question

$(a)\, \Delta U = 0$

$(b)\, q = 0$

$(c)\, \Delta T = 0$

$(d)\,q = 2.303\,nRT\,{\log _{10}}\,\left( {\frac{{{V_2}}}{{{V_1}}}} \right)$

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 $\mathrm{CH}_3 \mathrm{COONa}$