To a piece of charcoal, sulphuric acid is added. Then:

To a piece of charcoal, sulphuric acid is added. Then:
  1. there is no reaction
  2. water gas is formed
  3. $\mathrm{SO}_{2}$ and $\mathrm{CO}_{2}$ are evolved
  4. $\mathrm{CO}$ and $\mathrm{SO}_{2}$ are evolved

Solution

Charcoal is a pure form of carbon, its reaction with hot conc. $\mathrm{H}_{2} \mathrm{SO}_{4}$ is as follows:
$\mathrm{C}+2 \mathrm{H}_{2} \mathrm{SO}_{4} \longrightarrow 2 \mathrm{H}_{2} \mathrm{O}^{2}+2 \mathrm{SO}_{2}+\mathrm{CO}_{2}$ .

Asked in: JEE-TOPICTESTS-CHEMISTRY

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