what is galvanizing?name two alloy which contains tin as one of the component. state three uses of hydrogen. name the used to make lead of pencil. why do gold and silver occur free in nature? define corrosion. what is rust? why do copper vecies obtain a green coating in a rainy season?
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Graphite is used to make the lead of pencil.
Rust is a reddish-brown flaky substance which gets deposited on iron when the iron comes in contact with water and oxygen.
Rust is a reddish-brown flaky substance which gets deposited on iron when the iron comes in contact with water and oxygen.
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Galvanizing is one of the most widely used to methods for protecting metal from corrosion.it involve applying a thin coating of zinc to a thicker base metal,helping to shield it from the surrounding environment. A large number of them will have a mute, silver colour on them. that silver is actually the coating of zinc.
(a)Tinplate(b)Electroplating.
(a)chemical industry(b)atomic hydrogen welding(c)hydrogen gas can be used for metallic ore reduction.
(a)sold graphite(b)allitopes elements of carbon.
Only gold ,silver, copper and the platinum metal occur in nature in larger amount over geological time scales very few metalcan resist natural weathering process like oxidation ,which is why generally only reactive metal as gold and platinum are found as metals.
Corrosion is a natural process ,which convert a refined metal to a more chemical -stable from ,such as its oxide hydroxide, or sulfide it the gradual destruction of material.
Rust is an iron oxide ,usually red oxide by the redox reaction of iron and oxygen in the presence of water of air moisture. rust consists of hydrogen iron (lll)oxide Fe²o.
A copper vessel gets covered with green coating in raining season because the metal react with atmosphere co2 in the presence.
(a)Tinplate(b)Electroplating.
(a)chemical industry(b)atomic hydrogen welding(c)hydrogen gas can be used for metallic ore reduction.
(a)sold graphite(b)allitopes elements of carbon.
Only gold ,silver, copper and the platinum metal occur in nature in larger amount over geological time scales very few metalcan resist natural weathering process like oxidation ,which is why generally only reactive metal as gold and platinum are found as metals.
Corrosion is a natural process ,which convert a refined metal to a more chemical -stable from ,such as its oxide hydroxide, or sulfide it the gradual destruction of material.
Rust is an iron oxide ,usually red oxide by the redox reaction of iron and oxygen in the presence of water of air moisture. rust consists of hydrogen iron (lll)oxide Fe²o.
A copper vessel gets covered with green coating in raining season because the metal react with atmosphere co2 in the presence.
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