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