Q. Which acid is present in rust removers?

A
Lactic Acid
B
Acetic Acid
C
Phosphoric Acid
D
Carbonic Acid
Solution:

As a result, it is desirable to remove rust and protect fresh surface from oxidizers. The common rust removal reagents are mainly based on complex formation of ferric ion with organic and inorganic acids such as citric acid, oxalic acid, and phosphoric acid.

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