1. Tardigrade
  2. Question
  3. Chemistry
  4. The reaction of K 3[ Fe ( CN )6] with freshly prepared FeSO 4 solution produces a dark blue precipitate called Turnbull's blue. Reaction of K 4[ Fe ( CN )6] with the FeSO 4 solution in complete absence of air produces a white precipitate X, which turns blue in air. Mixing the FeSO 4 solution with NaNO 3, followed by a slow addition of concentrated H 2 SO 4 through the side of the test tube produces a brown ring. Among the following, the brown ring is due to the formation of

Q. The reaction of with freshly prepared solution produces a dark blue precipitate called Turnbull's blue. Reaction of with the solution in complete absence of air produces a white precipitate , which turns blue in air. Mixing the solution with , followed by a slow addition of concentrated through the side of the test tube produces a brown ring.
Among the following, the brown ring is due to the formation of

 1977  175 JEE AdvancedJEE Advanced 2021 Report Error

Solution: