A) \[{{H}_{2}}S{{O}_{4}}+S{{O}_{2}}\]
B) \[{{H}_{2}}S{{O}_{4}}+S{{O}_{3}}\]
C) \[{{H}_{2}}{{S}_{2}}{{O}_{3}}+S{{O}_{3}}\]
D) \[{{H}_{2}}{{S}_{2}}{{O}_{3}}+S{{O}_{2}}\]
Correct Answer: B
Solution :
\[{{\text{H}}_{\text{2}}}{{\text{S}}_{\text{2}}}{{\text{O}}_{\text{7}}}\]is oleum. It is formed by dissolving \[\text{S}{{\text{O}}_{3}}\]in \[{{H}_{2}}S{{O}_{4}}\]which upon dilution gives two molecules of \[{{H}_{2}}S{{O}_{4}}\]
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