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, … WebMar 14, 2024 · Iron is rendered passive by treatment with concentrated (a) H2SO4 (b) H3PO4 (c) HCl (d) HNO3 transition elements coordination compounds jee jee mains 1 Answer +1 vote answered Mar 14, 2024 by Ankitk (74.5k points) selected Mar 15, 2024 by Vikash Kumar Best answer The correct option (d) HNO3 Explanation:
Passivation (chemistry) - Wikipedia
WebJul 19, 2024 · Iron is rendered passive by treatment with A. aquaregia B. conc. H 2S O4 H 2 S O 4 C. conc. H N O3 H N O 3 D. conc. H C l H C l class-12 15th-group-elements Please log in or register to answer this question. 1 Answer 0 votes answered Jul 19, 2024 by Anshuman Sharma (78.3k points) Correct Answer - C WebQ. Iron is rendered passive by treatment with concentrated 1943 47 IIT JEE IIT JEE 1982 General Principles and Processes of Isolation of Elements Report Error A H 2S O4 B H 3P O4 C H Cl D H N O3 Solution: Iron is rendered passive by concentrated H N O3 due to formation of a thick protective layer of F e3O4 . chiropractic orthotics
Iron is rendered passive with fuming nitric acid. Give reasons
WebThe reaction of iron with fuming nitric acid makes it passive which means inert in nature. It dissolves in concentrated nitric acid and forms a metal oxide layer of Fe 3 O 4 which prevents it from further oxidation. The reaction of Fe with HNO 3 is shown as below; 3Fe+8HNO 3→Fe 3O 4+4H 2O+8NO 2 Explanation for Incorrect Option: In case of H 2 SO 4 WebApr 6, 2024 · Thus, you can say that the iron is made passive or inert by treatment with fuming nitric acid. This happens with several other metals such as aluminium, cobalt and … The passive surface is validated using humidity, elevated temperature, a rusting agent (salt spray), or some combination of the three. The passivation process removes exogenous iron, [18] creates/restores a passive oxide layer that prevents further oxidation ( rust ), and cleans the parts of dirt, scale, or other … See more Passivation, in physical chemistry and engineering, refers to coating a material so it becomes "passive", that is, less readily affected or corroded by the environment. Passivation involves creation of an outer layer of shield … See more Discovery In the mid 1800s, Christian Friedrich Schönbein discovered that when a piece of iron is … See more • Cold welding • Deal-Grove model • Pilling–Bedworth ratio See more There has been much interest in determining the mechanisms that govern the increase of thickness of the oxide layer over time. Some of the important factors are the volume of oxide relative to the volume of the parent metal, the mechanism of … See more Aluminium Aluminium naturally forms a thin surface layer of aluminium oxide on contact with oxygen in … See more • ASTM (1 March 2010), ASTM A967: Standard specification for chemical passivation treatments for stainless steel parts (Rev 05e2 ed.), doi:10.1520/A0967-05E02. … See more chiropractic orthopedics