WBJEE · Chemistry · p Block Elements (Group 15, 16, 17 & 18)
Sulphan' is
- A a mixture of \(\mathrm{SO}_{3}\) and \(\mathrm{H}_{2} \mathrm{SO}_{3}\)
- B \(100 \%\) conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\)
- C a mixture of gypsum and conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\)
- D \(100 \%\) oleum (a mixture of \(100 \% \mathrm{SO}_{3}\) in \(100 \%\) \(\left.\mathrm{H}_{2} \mathrm{SO}_{4}\right)\)
Answer & Solution
Correct Answer
(D) \(100 \%\) oleum (a mixture of \(100 \% \mathrm{SO}_{3}\) in \(100 \%\) \(\left.\mathrm{H}_{2} \mathrm{SO}_{4}\right)\)
Step-by-step Solution
Detailed explanation
\(\mathrm{H}_{2} \mathrm{SO}_{4}\) saturated with \(\mathrm{SO}_{3}\) is called oleum of sulphan. \[ \mathrm{H}_{2} \mathrm{SO}_{4}+\mathrm{SO}_{3} \longrightarrow \mathrm{H}_{2} \mathrm{S}_{2} \mathrm{O}_{7} \]
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