MCQ
The species having pyramidal shape is
- ✓$SO_3^{2-}$
- B$SO_3$
- C$CO_3^{2-}$
- D$ClF_3$
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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 $\mathrm{CH}_3 \mathrm{COONa}$

${C_2}{H_{4(g)}} + {H_{2(g)}} \rightleftharpoons {C_2}{H_{6(g)}}\,;$
$\Delta H = -32.7\,Kcal$ carried out is a vessel, the equilibrium concentration of $C_2H_4$ can be increased by