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  • Which of the following combines with Fe (II) ions to form a brown complexOption: 1 <img alt="N_{2} O" src="https://entrancecorner.oncodecogs.com/gif.

Which of the following combines with Fe (II) ions to form a brown complex

Option: 1

N_{2} O


Option: 2

\mathrm{NO}


Option: 3

\mathrm{N}_{2} \mathrm{O}_{3}


Option: 4

\mathrm{N}_{2} \mathrm{O}_{5}


Answers (1)

best_answer

Brown ring is obtained when \text{NO} forms a complex with aq. \mathrm{Fe}^{2+}.

The reaction occurs as given below

\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}+\mathrm{NO} \longrightarrow[\text{Fe}(\text{H}_{2}\text{O})_{5}\text{NO}]^{2+}+\mathrm{H}_{2} \mathrm{O}.

Hence, the correct answer is Option (2)

Posted by

Shailly goel

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