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

• Correct answer
  A

  sulphur trioxide
• B

  sulphur dioxide
• C

  sulphur
• D

  a mixture of sulphur dioxide and sulphur trioxide

Solution

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

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