Question
Sulphur trioxide can be obtained by which of the following reaction?
A.
\[CaS{{O}_{4}}+C\xrightarrow{\Delta }\]
B.
\[F{{e}_{2}}{{\left( S{{O}_{4}} \right)}_{3}}\xrightarrow{\Delta }\]
C.
\[S+{{H}_{2}}S{{O}_{4}}\xrightarrow{\Delta }\]
D.
\[{{H}_{2}}S{{O}_{4}}+PC{{l}_{5}}\xrightarrow{\Delta }\]
Answer :
\[F{{e}_{2}}{{\left( S{{O}_{4}} \right)}_{3}}\xrightarrow{\Delta }\]
Solution :
\[\begin{align}
& \left( \text{A} \right)\,CaS{{O}_{4}}+C\xrightarrow{\Delta }CaO+S{{O}_{2}}+CO \\
& \left( \text{B} \right)\,F{{e}_{2}}{{\left( S{{O}_{4}} \right)}_{3}}\xrightarrow{\Delta }F{{e}_{2}}{{O}_{3}}+3S{{O}_{3}} \\
& \left( \text{C} \right)\,S+2{{H}_{2}}S{{O}_{4}}\xrightarrow{\Delta }3S{{O}_{2}}+2{{H}_{2}}O \\
\end{align}\]
\[\left( \text{D} \right)\,{{H}_{2}}S{{O}_{4}}+PC{{l}_{5}}\xrightarrow{\Delta }\] \[\underset{\text{Chloro sulphonic acid}}{\mathop{S{{O}_{3}}HCl}}\,+POC{{l}_{3}}+HCl\]