A) \[S{{O}_{2}}\]
B) \[{{H}_{2}}S\]
C) \[{{S}_{2}}O\]
D) \[S{{O}_{3}}\]
Correct Answer: D
Solution :
\[{{H}_{2}}S{{O}_{4}}+S{{O}_{3}}\to \underset{(\text{Oleum}\,\text{or}\,\text{Fuming}\,{{H}_{2}}S{{O}_{4}})}{\mathop{{{H}_{2}}{{S}_{2}}{{O}_{7}}}}\,\]
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