\[ \begin{array}{l} \mathrm{C}(\mathrm{s})+\mathrm{O}_{2}(\mathrm{~g}) \rightarrow \mathrm{CO}_{...

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\[
\begin{array}{l}
\mathrm{C}(\mathrm{s})+\mathrm{O}_{2}(\mathrm{~g}) \rightarrow \mathrm{CO}_{2}(\mathrm{~g})+4 \mathrm{OO} \mathrm{kJ} \\
\mathrm{C}(\mathrm{s})+\frac{1}{2} \mathrm{O}_{2}(\mathrm{~g}) \rightarrow \mathrm{CO}(\mathrm{g})+100 \mathrm{~kJ}
\end{array}
\]
When coal of purity \( 60 \% \) is allowed to burn in presence of insufficient oxygen, \( 60 \% \) of carbon is converted into \( \mathrm{CO} \) and the remaining is converted into \( \mathrm{CO}_{2} \) .
The heat generated when \( 0.6 \mathrm{~kg} \) of coal is burnt is
(a) \( 1600 \mathrm{~kJ} \)
(b) \( 3200 \mathrm{~kJ} \)
(c) \( 4400 \mathrm{~kJ} \)
(d) \( 6600 \mathrm{~kJ} \)
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