MCQ
Sodium oxalate on heating with conc. ${H_2}S{O_4}$ gives
- A$CO$ only
- B$C{O_2}$ only
- ✓$CO$ and $C{O_2}$
- D$S{O_2}$ and $S{O_3}$
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The heat of the reaction $2Mg + Si{O_2} \to 2MgO + Si$ is......$kJ$