question_answer

In which of the following reactions will there be no change in the oxidation number of nitrogen?

A) \[HN{{O}_{3}}+2{{H}_{2}}S{{O}_{4}}\xrightarrow[{}]{{}}NO_{2}^{+}+{{H}_{3}}{{O}^{+}}\] \[+2HSO_{4}^{-}\]

B) \[2{{N}_{2}}{{O}_{4}}+2KI\xrightarrow[{}]{{}}2KN{{O}_{3}}+2NO+{{I}_{2}}\]

C) \[2KN{{H}_{2}}+{{N}_{2}}O\xrightarrow[{}]{{}}K{{N}_{3}}+KOH+N{{H}_{3}}\]

D) \[4N{{O}_{2}}+{{O}_{2}}+2{{H}_{2}}O\xrightarrow[{}]{{}}4HN{{O}_{3}}\]