Question

any two metal oxide to converted into metal​

Answer 1

Metals tend to form basic oxides, non-metals tend to form acidic oxides, and amphoteric oxides are formed by elements near the boundary between metals and non-metals (metalloids). ... Exposed to water, they may form basic hydroxides. For example, sodium oxide is basic—when hydrated, it forms sodium hydroxide.

Answer 2

Introduction

The oxide minerals typically present in soils comprise oxides, hydroxides, oxyhydroxides, and hydrated oxides of Si, Fe, Mn, Al, and Ti. With the exception of the Si oxide quartz and some Ti oxides, which are predominantly inherited from primary (rock) minerals, most oxides form in soil. The metal cations Fe2+, Mn2+, Ti4+, Al3+, and Si4+ are released from silicates by weathering. The divalent cations Mn and Fe oxidize and hydrolyze, and precipitate almost exclusively as oxide minerals. Al3+ and Si4+ have a strong tendency to form secondary aluminosilicate clay minerals; the formation of Al and Si oxides requires special conditions. All oxides have a very low solubility at common soil pH and are therefore enriched during pedogenesis. Highly weathered soils, which have lost a substantial part of their alkalis, alkaline earths, and Si, may contain as much as 50% wt metal oxides.

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