During the finishing of steel, sheets of rods of steel are treated with pickling baths of Sulphuric acid. This is performed to remove the impurities (oxide layer, scales, etc.) on the surface of the steel but this process also produces a by-product in large quantities. Which of the following could be that by-product?

Iron (II) Oxide

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Iron (II) Chloride

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Iron (II) Sulphate

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Metallic Iron is precipitated

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Solution

The correct option is C Iron (II) Sulphate
What is the chief constituent of steel? It is Iron isn’t it?
$F e + H_{2} S O_{4} \to F e S O_{4} + H_{2}$

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Similar questions

(p) Nitriding	(I) Process of heating steel to redness and then cooling it very slowly
(Q)Annealing	(II) Process of heating steel in presence of $N H_{3}$ and producing hard coating of Iron Oxide on the surface of steel
(R) Tempering	(II) Process of heating steel to redness and then cooling it suddenly by plunging it into water or oil.
(S) Quenching	(IV) Process of heating quenched steel to a temperature well below redness and then cooling it slowly

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