MCQ
$4$ -Pentenoic acid when treated with $I_2$ and $NaHCO_3$ gives
- A$4, 5$ -diiodopentanoic acid
- ✓$5$ -iodomethyl-dihydrofuran- $2$ -one
- C$5$ -iodo-tetrahydropyran- $2$ -one
- D$4$ -pentenolyiodide
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Statement $II:$- The crossed arrow of the dipole moment symbolizes the direction of the shift of charges in the molecules.
In the light of the above statements, choose the most appropriate answer from the options given below :-
$Fe_2O_{3(s)} + 3CO_{(g)} \rightarrow 2Fe_{(s)} + 3CO_{2(g)};$ $\Delta H = - 26.8\, kJ$
$FeO_{(s)} + CO_{(g)} \rightarrow Fe_{(s)} + CO_{2(g)} \, ;$ $\Delta H = - 16.5\, kJ$
The value of $\Delta H$ for the following reaction
$Fe_2O_{3(s)} + CO_{(g)} \rightarrow 2FeO_{(s)} + CO_{2(g)}$ is ............. $\mathrm{kJ}$
