Chemistry
The gas formed when carbon reacts with concentrated sulphuric acid
- Hydrogen
- Sulphur trioxide
- Sulphur dioxide
- Oxygen
Sulphuric Acid
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Answer
Sulphur dioxide
Reason — Concentrated sulphuric acid acts as an oxidising agent. Its oxidising property is due to the fact that on thermal decomposition it yields nascent oxygen [O].
H2SO4 ⟶ H2O + SO2 + [O]
Nascent oxygen oxidises non-metals like carbon, sulphur dioxide (SO2) is evolved.
C + 2H2SO4 [conc.] ⟶ CO2 + 2H2O + 2SO2 ↑
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