In the brown ring test, the brown colour of the ring is due to

Question

In the brown ring test, the brown colour of the ring is due to (A) ferrous nitrate (B) ferric nitrate (C) a mixture of NO and NO2 (D) nitrosoferrous -I sulphate

Tardigrade Admin · Accepted Answer

To the nitrate salt, add freshly prepared

F e S O_{4}

solution and then cone.

H_{2} S O_{4}

H_{2} S O_{4}

carefully by the sides of test-tube.
A dark brown ring of ferrous nitroso sulphate is formed.

N a N O_{3} + H_{2} S O_{4} \to N a H S O_{4} + H N O_{3}

2 H N O_{3} + 6 F e S O_{4} + 3 H_{2} S O_{4} \to 3 F e_{2} (S O_{4})_{3} + 2 n o + 4 H_{2} O

F e S O_{4} + NO \to ferrous nitrososulphate (brown ring) [F e NO] S O_{4}

Q. In the brown ring test, the brown colour of the ring is due to

ferrous nitrate

ferric nitrate

a mixture of $NO$ and $N O_{2}$

nitrosoferrous $- I$ sulphate

Q. In the brown ring test, the brown colour of the ring is due to

ferrous nitrate

ferric nitrate

a mixture of NO and NO2​

nitrosoferrous −I sulphate

a mixture of $NO$ and $N O_{2}$

nitrosoferrous $- I$ sulphate