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Question

Predict the modes of occurrence of the following three types of metals:(i) Highly reactive (e.g., Na)(ii) Moderately reactive (e.g., Fe)(iii) Noble metal (e.g., Au)

Prabhat Rajore · Accepted Answer

(i) Sodium being highly reactive in nature, it does not occur in free state. It occurs as : NaCl, NaNO₃, Na₂SO₄ and Na₂B₄O₇.10H₂O.

(ii) Iron being moderately reactive in nature, it does not occur in free state. In combined state it occurs as : Fe₂O_3, Fe₃O₄, FeCO₃, FeS₂ and CuFeS₂.

(iii) Noble metal like gold being non-reactive do not occur free in nature.

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General Principles And Processes Of Isolation Of Elements

Predict the modes of occurrence of the following three types of metals:

(i) Highly reactive (e.g., Na)
(ii) Moderately reactive (e.g., Fe)
(iii) Noble metal (e.g., Au)

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