Question

one mark plz give me answer​

Answer 1

Answer:

define galvanisation

Explanation:

Depositing/painting a thick layer of zinc on iron to prevent rusting

Answer 2

Minerals:— Minerals are solid substances that are present in nature and can be made of one element or more elements combined together (chemical compounds).

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Metallurgy:— Metallurgy, art and science of extracting metals from their ores and modifying the metals for use.

Thermite Reaction:— A thermite reaction is basically iron oxide (rust) reacting with aluminum to produce molten iron.

Galvanization:— Galvanization or galvanizing is the process of applying a protective zinc coating to steel or iron, to prevent rusting.

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What happens when ZnCO3 is heated in the absence of air?

When ZnCO3 is heated in the absence of air ZnO(s) and CO2(g) are formed.

ZnCO3 → ZnO + CO2.

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Why is carbon not used for reducing aluminium from aluminium oxide?

Aluminium oxide is very stable and Carbon is less reactive than aluminium, thus it cannot be used to reduce aluminium oxide to aluminium metal.