MCQ
The $IUPAC$ name of compound


- A$1,2,3-$ tricarboxy $-2-$ propanol
- ✓$2-$ hydroxy propane $-1,2,3$ tricarboxylic acid
- C$3-$ hydroxy $-3-$ Carboxy $-1,5-$ pentane dioic acid
- DNone

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${I^ - } + \,ClO_3^- + \,{H_2}S{O_4}\, \to \,C{l^ - }\, + \,HSO_4^ - \, + \,{I_2}$
(no free $H^+$ is present). Select the correct statement in the balanced equation (Coefficients in smallest whole number ratio.)
$(i)$ $H_{(aq)}^+ + OH^-= H_2O_{(l)} ,$ $\Delta H = -X_1\,kJ \,mol^{-1}$
$(ii)$ $H_{2(g)} + \frac{1}{2}O_{2(g)} = H_2O_{(l)},$ $\Delta H = -X_2\,kJ \,mol^{-1}$
$(iii)$ $CO_{2(g)} + H_{2(g)} = CO_{(g)} + H_2O_{(l)},$ $\Delta H = -X_3\, kJ\, mol^{-1}$
$(iv)$ $ C_2H_{2(g)}+ \frac{5}{2} O_{2(g)} = 2CO_{2(g)} + H_2O_{(l)},$ $\Delta H = -X_4\,kJ \,mol^{-1}$
Enthalpy of formation of $H_2O_{(l)}$ is
