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Corrosion

Which of the ...

Question

Which of the following solutions is used as anti rusting solution
Na₂SO₄

Na₃PO₄

Na₂S

Na₃BO₃

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Solution

Dear student

Na₃PO₄ solution is used as an anti rusting solution.
When iron objects are dipped into strongly alkaline solution of sodium phosphate, a protective layer of insoluble iron phosphate is formed. This film prevents the object to be rusted.

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