Although metals form basic oxides, which of the following metals form an amphoteric oxide ?a)Nab)Cac)Ald)CuCorrect answer is option 'C'. Can you explain this answer?

Question

Answer

6 elements are amphoteric sb as al zn sn pb

Answer

Metals in general form basic oxides when they combine with oxygen. In the case of Aluminium, it forms an amphoteric oxide. Amphoteric oxides are metal oxides that can react with both acids as well as alkalis producing salt and water.

Answer

Answer

Amphoteric Oxides:

Amphoteric oxides are the oxides that can react both as acids and bases, depending on the reaction conditions. These oxides can react with both acidic and basic solutions to form salts. One example of an amphoteric oxide is aluminum oxide (Al2O3).

Explanation:

When metals react with oxygen, they form metal oxides. Most metals form basic oxides, which means these oxides dissolve in water to form alkaline solutions. However, there are some metals that can form amphoteric oxides, meaning their oxides can act as both acids and bases.

Among the given options, the metal that forms an amphoteric oxide is aluminum (Al). When aluminum reacts with oxygen, it forms aluminum oxide (Al2O3), which is an amphoteric oxide.

The reaction of aluminum oxide with acid and base can be represented as follows:

1. Reaction with Acid:
Al2O3 + 6HCl → 2AlCl3 + 3H2O

In this reaction, aluminum oxide acts as a base and reacts with hydrochloric acid (HCl) to form aluminum chloride (AlCl3) and water (H2O).

2. Reaction with Base:
Al2O3 + 2NaOH + 3H2O → 2Na[Al(OH)4]

In this reaction, aluminum oxide acts as an acid and reacts with sodium hydroxide (NaOH) to form sodium tetrahydroxoaluminate [Na[Al(OH)4]].

Therefore, aluminum (Al) is the metal that forms an amphoteric oxide among the given options.

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