WebMar 19, 2024 · 1.Iron is rendered passive with fuming nitric acid. Concentrated HNO3 being a strong oxidising agent oxidises iron forming a layer that makes iron non-reactive or passive. Zinc sulphide and dilute sulphuric acid. 2.Alkali metals are good reducing agents because alkali metals have one valence electron which they lose to attain stability. WebIron is rendered passive with fuming nitric acid. Medium Solution Verified by Toppr Metals like iron, aluminium,cobalt and nickel become inert or you can say passive when treated …
Passivation (chemistry) - Wikipedia
WebAt the high pH, a thin oxide layer forms on the steel and prevents metal atoms from dissolving. This passive film does not actually stop corrosion; it reduces the corrosion rate to an insignificant level. For steel in concrete, … WebAnswer: We know concentrated HNO3 is strong oxidizing acids, so concentrated HNO3 can easily loot Fe’s electron, which leads to a large increasing in valence of Fe, and a decreasing in the valence of N. (Most of the resultant is Fe3O4, which is very stable in this situation.) When the iron dipp... ricerche word
Give reasons for the following: 1. Iron is rendered passive with …
WebLater work has shown that many other oxidising agents render iron passive towards reagents which attack the metal in its ordinary or ‘active’ condition; reducing agents tend … WebMar 28, 2024 · When iron is dipped in conc. HNO3, it becomes chemically inert or passive due to the formation of a layer of iron oxide (Fe3O4) on its surface. Concentrated nitric acid can be used to coat metals like iron, chromium, aluminium, and calcium, forming a protective oxide film that prevents further reactions. Why is nitric acid used in halide test? Webrender the iron passive. The experiments which I have the honour to submit to the Academy were instituted with the aim of casting some light ou this interesting question. I. (1) Iron which has been rendered p'Lssive is immersed in the ordinary acid and caused to strike against the sides of the vessel ... redirection uecontextreleasecommand