MCQ
Which one of the following is most soluble
- A$CuS\,({K_{sp}} = 8 \times {10^{ - 37}})$
- ✓$MnS\,({K_{sp}} = 7 \times {10^{ - 16}})$
- C$B{i_2}{S_3}\,({K_{sp}} = 1 \times {10^{ - 70}})$
- D$A{g_2}S\,({K_{sp}} = 6 \times {10^{ - 51}})$
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$C(s) + {O_2}(g) \to C{O_2}(g),\Delta H = - 394\,kJ$
$2{H_2}(g) + {O_2}(g) \to 2{H_2}O(l),\,\Delta H = 568\,kJ$
$C{H_4}(g) + 2{O_2}(g)\,\, \to \,\,C{O_2}(g) + 2{H_2}O(l)$ $\Delta H = - 892\,kJ$ Heat of formation of $C{H_4}$ is.....$kJ$