A) \[NaBr+HCl\xrightarrow{{}}NaCl+HBr\]
B) \[HBr+AgN{{O}_{3}}\text{ }\xrightarrow{{}}\text{ }AgBr+HN{{O}_{3}}\]
C) \[{{H}_{2}}+B{{r}_{2}}\xrightarrow{{}}2HBr\]
D) \[CaO+{{H}_{2}}S{{O}_{4}}\xrightarrow{{}}CaS{{O}_{4}}+{{H}_{2}}O\]
Correct Answer: C
Solution :
Addition of hydrogen is reduction and addition of halogen is oxidation. Both reactions takes place in \[{{H}_{2}}+B{{r}_{2}}\xrightarrow{{}}2HBr\].
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