A) \[{{H}_{2}}O\] and \[HBr\]
B) \[{{H}_{2}}S{{O}_{4}}\] and \[HBr\]
C) \[HBr\] and \[S\]
D) \[S\] and \[{{H}_{2}}O\]
Correct Answer: B
Solution :
\[B{{r}_{2}}+2{{H}_{2}}O+S{{O}_{2}}\,\to {{H}_{2}}S{{O}_{4}}+2HBr\]
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