Q49 / 180 · COMEDK 2020 · Chemistry

When conc. $\mathrm{H}_{2} \mathrm{SO}_{4}$ is heated with $\mathrm{P}_{2} \mathrm{O}_{5}$, the acid is converted into

  • A
    sulphur
  • B
    sulphur dioxide
  • Correct answer
    C
    sulphur trioxide
  • D
    a mixture of sulphur dioxide and sulphur trioxide

Solution

When eonc. $\mathrm{H}_{2} \mathrm{SO}_{4}$ is heated with $\mathrm{P}_{2} \mathrm{O}_{5}$, the acid is convertod into sulphur trioxide. $$ \mathrm{H}_{2} \mathrm{SO}_{4}+\mathrm{P}_{2} \mathrm{O}_{5} \longrightarrow \mathrm{SO}_{3}+2 \mathrm{HPO}_{3} $$

Hence, the correct answer is option: 'C'.

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