Question

why is aluminium kept inp block

Answer 1

Answer:

The oxygen present in water reacts with aluminium to form akhil layer of aluminium oxide. This layer present aluminium from further reaction . However when water is kept in an aluminium vessels for long periods of time, some amount of aluminium oxide may dissolve in water.

Explanation:

This is Solution 1. thnx

Answer 2

Pieces are cleaned chemically/mechanically and blocked to minimize oxidation losses when melted. (The surface of aluminium readily oxidizes back into aluminium oxide when exposed to oxygen.) Blocks are loaded into the furnace and heated to 750 °C ± 100 °C to produce molten aluminium.

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