MCQ
When we heat water, we can find bubbles coming from it. This shows that:
- ✓water contains air
- Bair contains water
- Chot water becomes bubbles
- DNone of these
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${\text{2PQ}} \rightleftharpoons {{\text{P}}_2}{\text{ + }}{{\text{Q}}_2}\,;\,\,\,\,{{\text{K}}_1}{\text{ = 2}}{\text{.5 }} \times \,{\text{1}}{{\text{0}}^5}\,$
${\text{PQ + }}\frac{1}{2}{R_2} \rightleftharpoons PQR\,;\,\,\,\,{{\text{K}}_2}{\text{ = 5 }} \times \,{\text{1}}{{\text{0}}^{ - 3}}\,$
The value of equilibrium constant for reaction
$\frac{1}{2}{{\text{P}}_2}{\text{ + }}\frac{1}{2}{{\text{Q}}_2}{\text{ + }}\frac{1}{2}{R_2} \rightleftharpoons PQR\,$ is
$\begin{array}{|l|l|} \hline Product & Sulphide\,\,Solubility \\ \hline (I) & 1.74\,\,\times\,\,10^{-16} \\ \hline (II) & 1.2\,\,\times\,\,10^{-22} \\ \hline (III) & 8.2\,\,\times\,\,10^{-46} \\ \hline (IV) & 5.0\,\,\times\,\,10^{-34} \\ \hline \end{array}$