Chemistry
The gas formed when carbon reacts with concentrated sulphuric acid
- Hydrogen
- Sulphur trioxide
- Sulphur dioxide
- Oxygen
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 ↑
Related Questions
Among the period 2 elements, the element which has the highest electron affinity is:
- Lithium
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- Chlorine
- Fluorine
Among the following compounds, identify the compound that has all three bonds (ionic, covalent and coordinate bonds).
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- Ammonium chloride
- Sodium hydroxide
- Calcium chloride
Which of the following would weigh the most?
- 1 mole of H2O
- 1 mole of CO2
- 1 mole of NH3
- 1 mole of CO
Which of these will act as a non-electrolyte?
- Liquid carbon tetrachloride
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- Sodium hydroxide aqueous solution acid
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