A) \[[Fe{{({{H}_{2}}O)}_{5}}NO]S{{O}_{4}}\]
B) \[FeS{{O}_{4}}.N{{O}_{2}}\]
C) \[Fe[{{({{H}_{2}}O)}_{5}}]{{(N{{O}_{3}})}_{2}}\]
D) None of these
Correct Answer: A
Solution :
\[NO_{3}^{-}+{{H}_{2}}S{{O}_{4}}\to HN{{O}_{3}}+HSO_{4}^{-}\] \[2HN{{O}_{3}}\to {{H}_{2}}O+2NO+3[O]\] \[FeS{{O}_{4}}+NO+5{{H}_{2}}O\to \underset{\text{Brown colour}}{\mathop{[Fe{{({{H}_{2}}O)}_{5}}N{{O}^{+}}]\,S{{O}_{4}}}}\,\]
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