MCQ
A solution of sodium bicarbonate in water turns
- APhenolphthalein pink
- BMethyl orange yellow
- ✓Methyl orange red
- DBlue litmus red
$NaC{O_3} \rightleftharpoons N{a^ + } + HCO_3^ - $
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$Fe_2O_{3(s)} + 3CO_{(g)} \rightarrow 2Fe_{(s)} + 3CO_{2(g)};$ $\Delta H = - 26.8\, kJ$
$FeO_{(s)} + CO_{(g)} \rightarrow Fe_{(s)} + CO_{2(g)} \, ;$ $\Delta H = - 16.5\, kJ$
The value of $\Delta H$ for the following reaction
$Fe_2O_{3(s)} + CO_{(g)} \rightarrow 2FeO_{(s)} + CO_{2(g)}$ is ............. $\mathrm{kJ}$