GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Increases
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Decreases
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Uncertain
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Remains the same
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Detailed explanation-1: -When iron or any other metal oxidizes, oxygen from the air combines with the iron to make rust or iron oxide. So, the weight of the bar increases, due to the increased weight of oxygen which has combined with the iron.
Detailed explanation-2: -Rusting is an oxidation reaction. The iron reacts with water and oxygen to form hydrated iron(III) oxide, which we see as rust. Iron and steel rust when they come into contact with water and oxygen – both are needed for rusting to occur.
Detailed explanation-3: -Introduction. There are several factors influencing the rate of corrosion including diffusion, temperature, conductivity, type of ions, pH value and electrochemical potential.
Detailed explanation-4: -does not affect weight but iron is reduced.
Detailed explanation-5: -When an iron object rusts, the change in state of iron occurs as iron reacts with oxygen and result in the formation of iron oxide. The addition of oxygen to iron increases the total mass but the mass of iron doesn’t change.