Nguyên tử S chỉ đóng vai trò là chất oxi hoá trong phản ứng nào sau đây?
A.$ S\text{ }+\text{ }6HN{{O}_{3\text{ }(dac)}}\xrightarrow{{{t}^{0}}}{{H}_{2}}S{{O}_{4}}+\text{ }6N{{O}_{2}}+\text{ }2{{H}_{2}}O $
B.$$S + {\rm{ }}{H_2} \xrightarrow{{{t}^{0}}}{H_2}S$$
C.$ S\text{ }+\text{ }3{{F}_{2}}\xrightarrow{{{t}^{0}}}S{{F}_{6}} $
D.$ 4S\text{ }+\text{ }6NaO{{H}_{(dac)}}\xrightarrow{{{t}^{0}}}2N{{a}_{2}}S\text{ }+\text{ }N{{a}_{2}}{{S}_{2}}{{O}_{3}}+\text{ }3{{H}_{2}}O $
A.$ S\text{ }+\text{ }6HN{{O}_{3\text{ }(dac)}}\xrightarrow{{{t}^{0}}}{{H}_{2}}S{{O}_{4}}+\text{ }6N{{O}_{2}}+\text{ }2{{H}_{2}}O $
B.$$S + {\rm{ }}{H_2} \xrightarrow{{{t}^{0}}}{H_2}S$$
C.$ S\text{ }+\text{ }3{{F}_{2}}\xrightarrow{{{t}^{0}}}S{{F}_{6}} $
D.$ 4S\text{ }+\text{ }6NaO{{H}_{(dac)}}\xrightarrow{{{t}^{0}}}2N{{a}_{2}}S\text{ }+\text{ }N{{a}_{2}}{{S}_{2}}{{O}_{3}}+\text{ }3{{H}_{2}}O $
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