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 sulphate

Tardigrade Admin · Accepted Answer

Ring test: To the nitrate salt, add freshly prepared

F e S O_{4}

solution and then cone

H_{2} S O_{4}

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

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

2 H N O_{3} + 6 F e S O_{4} + 3 H_{2} SO ⟶ 3 F e_{2} (S O_{4})_{3} + 2 NO + 4 H_{O}

F e S O_{4} + NO ⟶ ferrous nitrososulphate [F e \cdot 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 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 sulphate

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