A) \[2KN{{O}_{3}}\xrightarrow{{}}2KN{{O}_{2}}+{{O}_{2}}\]
B) \[BaC{{l}_{2}}+{{H}_{2}}S{{O}_{4}}\xrightarrow{{}}BaS{{O}_{4}}+2HCl\]
C) \[{{C}_{2}}{{H}_{4}}+{{H}_{2}}\xrightarrow{{}}{{C}_{2}}{{H}_{6}}\]
D) \[CuS{{O}_{4}}+Fe\xrightarrow{{}}FeS{{O}_{4}}+Cu\]
E) None of these
Correct Answer: A
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