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Iron is rendered passive by treatment with concentrated
Iron is rendered passive by treatment with concentrated
Updated On: Jun 14, 2022
- $H_2SO_4$
- $H_3PO_4$
- HCl
- $HNO_3$
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The Correct Option is D
Solution and Explanation
Iron is rendered passive by concentrated $HNO_3$ due to formation of a thick protective layer of $Fe_3O_4$.
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Concepts Used:
General Principles and Processes of Isolation of Elements
What are Ores and Minerals?
Minerals are the naturally occurring, homogeneous inorganic solid substances. They are having a definite chemical composition and crystalline structure, hardness and color. For example, copper pyrite, calamine, etc.
Impurities in an ore are called gauge. The removal of a gauge from the ore is called concentration ore.
Several steps are involved in the extraction of pure metal from ores. Major steps are as follows โ
- Concentration of the ore
- Isolation of the metal from its concentrated ore
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