MCQ
Caro's acid is
- A${H_2}S{O_3}$
- B${H_3}{S_2}{O_5}$
- ✓${H_2}S{O_5}$
- D${H_2}{S_2}{O_8}$
$H - O\mathop { - \mathop S\limits_{\,||}^{\,||} - }\limits_{\,O}^{\,\,O} O - O - H$
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$(I)$ ${H_2}(g) + \frac{1}{2}{O_2}(g) \to {H_2}O(l);$
$\Delta {H^o_{298\,K}} = - 285.9\,kJ\,mo{l^{ - 1}}$
$(II)$ ${H_2}(g) + \frac{1}{2}{O_2}(g) \to {H_2}O(g);$
$\Delta {H^o_{298\,K}} = - 241.8\,kJ\,mo{l^{ - 1}}$
The molar enthalpy of vapourisation of water will be.....$kJ\,mol^{-1}$
$2 A ( g ) \rightarrow A _{2}( g )$
at $298\, K , \Delta U^ \ominus,=-20\, kJ\, mol ^{-1}, \Delta S \odot=-30\, J$$K ^{-1}\, mol ^{-1},$ then the $\Delta G ^{\ominus}$ will be........$J$
$Y$ is